47 results about "Ophthalmic Liquid" patented technology

An eye fluid applicator is adapted for connection to the mouth of a bottle containing an ophthalmic liquid and comprises means for dispensing ophthalmic liquid from the bottle in metered amounts and in a manner which avoids contacting the eye with the applicator. The applicator includes a metering member that has a metering cavity for holding a small amount of liquid and which is movable between a first position in which the metering cavity is disposed to receive liquid from the container and a second position in which it allows the liquid to spill out of the cavity into a holding chamber, and manually operable pneumatic means for removing liquid from the holding chamber and expelling it through a discharge orifice in the form of a narrow spray.

A handheld applicator designed to transfer a liquid drop of ophthalmic medicament into a human eye. The basic structure comprises a finger grip section and a drop retainer section, preferably connected to the grip section with an extension. The device is made from an elastomeric material that will allow for the safe transfer of a liquid drop into the eye. A drop dispensed from a container is placed onto the drop retainer section of the device where the surface tension provides drop adhesion. The user may administer the drop, without having to tilt the head, while maintaining an eyeglass assisted view into a mirror. Application of the drop occurs from the peripheral line of vision. When contact is made to the eye, surface tension is relieved and the drop safely transfers into the eye. The same applicator may have a drop retainer section with a different structure on each side.

The eye drop aimer system is used in connection with an eye drop container. The eye drop aimer system utilizes an aim instrument having at least one reflective surface. In a preferred embodiment, the reflective surface of the aim instrument is located vertically around the eye drop spout of the eye drop container, when the user visually aims with his or her reflected eye image in the reflective surface and the eye drop spout end, his or her head and eye are in a substantially horizontal position and the eye drop container is substantially vertically disposed, the position of the spout end seen in the reflected eye image in the reflective surface indicates the aim of the drops in the eye; a light source instrument having at least one light source is utilized to supply lighting when the users drop eye in dark and weak.

The present invention relates to an ophthalmic device designed to ease the use of eye drop dispensers. It is one ophthalmic device but can be thought of as consisting of two parts: the nose bridge (11), which rests on the user's nose and the body (19), which connects to the eye drop dispenser. The body is flat and comes off of the nose bridge at an angle, allowing the eye drop dispenser to point toward the eye. The body attaches to the eye drop dispenser by Velcro (18), adhesive tape, strap, or any other measure to adhere two things together. This allows the ophthalmic device to work with any type of eye drop dispenser. Together, the nose bridge and the body, allow the user to securely and easily administer an eye drop to the medial part of their eye.

The invention discloses an eyedrop dropping liquid auxiliary device for ophthalmic myopic patients. The eyedrop dropping liquid auxiliary device for the ophthalmic myopic patients comprises optical frames, piece supporting plates are movably installed at the bottoms of the optical frames through telescopic plates, a rotary column is rotatably connected to the front surface of a nose supporting frame through a boss, sliding plates are movably inserted and connected into the optical frames, buttons are installed at the tops of connecting seats, flexible plates corresponding to connecting platesare fixedly connected to the tops of the sliding plates, clamping columns are movably inserted and connected into the boss, a connecting rod assembly, a push plate and a rotary plate are installed ina clamping plate, swing rods are movably connected to the inner walls of brackets, and pronouncing plates are movably installed in arc plates. By arranging the two swing rods and the pronouncing plates, a user can judge and adjust head hypsokinesis; through the cooperation of the sliding plates, magnetic balls, the piece supporting plates and a magnetic ring, the function of automatically openinglower eyelids is realized; and by arranging the buttons and the sliding plates, one pressing operation is realized, the effects of opening the lower eyelids and dripping liquid medicine can be completed, the whole process is simple and convenient to operate, and use is convenient and labor-saving.

The invention provides an auxiliary device and a method for feeding eye drops through the auxiliary device. The auxiliary device comprises a camera unit, a power supply switch, one or more indication lamps, a storage and a processor. The camera unit and the indication lamps are arranged on a head unit of the auxiliary device, the power supply switch is disposed on one side wall of the auxiliary device, and the storage stores real-time images photographed by the camera unit. When the power supply switch starts, the processor automatically detects whether an eye drop bottle mouth is located on a proper feeding area position of an eye of a user according to the real time images photographed by the camera unit, and controls the indication lamps to flash according to a detection result. By means of the device and method, whether the eye drop bottle mouth is located on the proper feeding area position of the eye of the user can be automatically detected.

The present invention relates to an eye drops for preventing and curing electric ophthalmitis with high cure rate and obvious therapeutic effect. Its composition contains dicaine hydrochloride 0.5g, sodium chloride 0.82g, 0.1% adrenaline injection solution 5 ml and distilled water adding to 100ml.

The invention discloses a medical eyedrop bottle capable of quantitatively dropping eyedrops. The eyedrop bottle comprises an eyedrop bottle body. An integrated molded connector is arranged at the center of the top of the eyedrop bottle body, the connector is spirally sleeved with a sealing cover, an infusion opening is formed in the top of the connector, the outer side shell of the eyedrop bottlebody is sleeved with an annular air bag, and the connector is sleeved with an annular sleeve frame, wherein the annular air bag is communicated with the interior of the annular sleeve frame through aconnecting air pipe, and the top of the infusion opening is sleeved with a quantitative titrating head. By arranging the quantitative titrating head, eyedrops inside the eyedrop bottle body can be injected into the quantitative titrating head at first, then, the eyedrops in the quantitative titrating head can be dropped into the eyes, compared with traditional direct eyedrops dropping, quantitative dropping can be performed by dropping the eyedrops through the quantitative titrating head, and therefore the waste caused by excessive dropping of eyedrops is avoided.

The invention provides a composition comprising prostaglandin derivatives and valproic acid or a pharmaceutically acceptable salt thereof and an ophthalmic liquid formulation comprising the composition, wherein the prostaglandin derivative is preferably one of latanoprost, bemeprost, travoprost, taflurane, unoprost and latanoprostene, and valproic acid or a pharmaceutically acceptable salt thereofis preferably one of valproic acid, sodium valproate, sodium divalproate and magnesium valproate. The composition provided by the invention can synergistically reduce intraocular pressure, avoid theuse of cosolvent, and improve the safety of medicament.

The invention provides a moist chamber glasses comprising a glasses, two eye covers respectively attached with peripheries of the left and right eyes of a patient, and a fixing member fixing the eye covers on a patient head; a liquid drop portion is arranged on the glasses and used for dropping eye drops into patient eyes; the liquid drop portion comprises the following elements: liquid storage bottles used for storing eye drops; a liquid guide pipe connected with outlets of the liquid storage bottles and connected on the glasses, and provided with two drop ports extending into the eye covers and respectively facing the left eye and right eye of the patient; a flow regulator arranged on the liquid guide pipe and used for adjusting the eye drop flow; an air filter connected with outlets of the liquid storage bottles and used for filtering air, so the eye drops in the liquid storage bottles can smoothly flow out; a mount arranged on the glasses and used for mounting the liquid storage bottles and the flow regulator.

An eye fluid applicator is adapted for connection to the mouth of a bottle containing an ophthalmic liquid and comprises means for dispensing ophthalmic liquid from the bottle in metered amounts and in a manner which avoids contacting the eye with the applicator. The applicator includes a metering member that has a metering cavity for holding a small amount of liquid and which is movable between a first position in which the metering cavity is disposed to receive liquid from the container and a second position in which it allows the liquid to spill out of the cavity into a holding chamber, and manually operable pneumatic means for removing liquid from the holding chamber and expelling it through a discharge orifice in the form of a narrow spray.

The invention relates to a packing material and a purpose thereof. The inner cavity of the packing material is divided into a storage chamber and an air chamber by a flexible diaphragm or a soft bag; an air inlet of the air chamber is connected with a pressure device; when a content such as eyewash, toothpaste, shampoo and cough syrup needs to be discharged, the outlet of the air chamber is opened, and air is pressed into the air chamber through the pressure device, so that the air chamber is inflated to extrude the storage chamber to extrude out the content, thereby achieving the purpose that even though air does not enter the storage chamber, the content can be discharged to avoid air pollution. The packing material can be used for packing liquid, ointment matters, powdery matters, medicines for human purposes, veterinary medicines, pesticides, industrial liquid or semiliquid, chemical reagents, toothpaste, shampoo, hand wash, body wash, liquid or paste foods, drinking water, beverage, edible oil.

The invention discloses an ophthalmic liquid with the eye nutrient supplementing function. The ophthalmic liquid comprises the following raw materials in weight ratio: chrysanthemum 8-10 part, honey 7-Nine, borneol 6-8, cassia seed 4-Six, green suitcase three-5 part, Dingongteng 5-7 part, Cordyceps spore 4-7 part, DHA 0.5-0.7 part, vitamin A 0.3-0.5 part of zinc, 0.2-0.5 part, chromium 0.3-0.6 part, 0.001 part selenium-0.01 part, vitamin B 0.2-0.4 part, vitamin C 0.1-0.3 part, calcium 0.2-0.3 part, scale 0.7-0.9 part, lutein lipid 0.8-1 part, alpha-Linolenic acid 1-1.2 copy. The invention canadjust the focal length between the eye fundus and the pupil, Accelerate optic nerve conduction velocity, Increase eye blood circulation, Strengthen the nutrition of substance and oxygen to eyes, promote the reposition of spasmodic or eyestrain ciliary muscle, improve eyesight, activate glutathione peroxidase, improve eye control and deoxidation damage, prevent eye diseases and eye aging, improvethe oxygen carrying capacity of red blood cells, and achieve the effect of supplementing nutrients and relieving fatigue.

The invention discloses a portable ophthalmic liquid dropping device. The device comprises a bottom pad, a base, a bracket, a liquid medicine dropping mechanism and a liquid medicine bottle, wherein the liquid medicine dropping mechanism is fixedly mounted on one side of the upper end of the bracket; the liquid medicine bottle is clamped in the liquid medicine dropping mechanism. The bottom pad ismade of sponge, and the bottom pad and the base are consistent in shape, so that the comfort of the liquid dropping device in contact with a patient is enhanced; and the liquid medicine dropping mechanism is arranged, the upper end of the liquid medicine bottle is fixed conveniently by a fixing body, and the bottom pad clamps and fixes the bottleneck of the liquid medicine bottle. The device is simple in structure and convenient to dismount and mount, can be matched with a sold liquid medicine bottle for use, greatly facilitates replacement of the liquid medicine bottle and omits tedious personal filling; and a pressing mechanism is arranged, a user only needs to press a pressing disc with the thumb during liquid dropping, the pressing disc drives an extrusion disc to extrude the liquid medicine bottle through a guide column, liquid medicine in the liquid medicine bottle drops, and the device is simple in structure, convenient to operate and controllable in force.

The invention discloses an auxiliary eye drop dispenser and a use method thereof, and belongs to the technical field of medical supplies. The auxiliary eye drop dispenser comprises an eye drop dispenser body, a clamping body and two bracing frames arranged below the eye drop dispenser body, wherein the bracing frames are movably connected with the clamping body. A finger can passes through the clamp body, and the movement of the clamp body drives the bracing frames to move. A connecting rod is arranged in the eye drop dispenser body, the bracing frames and the clamping body are movably connected through a connecting rod, and the connecting rod is installed in the eye drop dispenser body. The eye drop dispenser body employs a bi-layer structure, an inner wall and an outer wall are fixed, and a gap is arranged between the inner wall and the outer wall. The clamp body is arranged on the side of the auxiliary eye drop dispenser to control the bracing frames on the lower side to open upper and lower eyelids, thereby solving the problem that eyes involuntarily close during an eye drop dispensing process. The auxiliary eye drop dispenser may not directly contact eyes, thereby preventing cross infection. The auxiliary eye drop dispenser can open eyelids and prevent eye drop from dropping to the outside of eyes. A plurality of liquid outlets are provided to allow eye drop to uniformly drop into eyes.

The invention discloses an ophthalmic liquid dropping device with a precise positioning function. The device comprises a folding mechanism I; the two sides of the folding mechanism I are provided withframes; the side, away from the folding mechanism I, of each frame is provided with a folding mechanism II; the front side of the folding mechanism I is provided with a locking mechanism; and the front side of the folding mechanism I is fixedly connected with a fixed pipe positioned in the locking mechanism. The whole liquid dropping device is worn on the eyes of a patient by the folding mechanisms II and anti-sliding rods, then a medicine bottle is placed in a placing mechanism, and finally an extrusion mechanism is operated and extruded to extrude the medicine bottle to achieve the purposeof liquid dropping, and the frames are just positioned at the eyes of the patient, so that medicine liquid can be accurately dropped in the eyes of the patient, the effect of precise positioning is achieved, and use convenience is brought for a user; and the ophthalmic liquid dropping device with the precise positioning function has the advantages of precise positioning and use convenience for theuser.

The utility model discloses an auxiliary eyedrop dropping instrument for ophthalmology, and belongs to the field of ophthalmology medical instruments. The auxiliary eyedrop dropping instrument comprises a liquid dropping assembly, a frame body, a controller, a mounting hole, a connecting piece, an eyelid pulling assembly, a protective frame, a first window and a second window, the first window and the second window are formed in the frame body, the eyelid pulling assembly is arranged in the face, close to the face, of the frame body, the liquid dropping assembly is arranged on the face, away from the face, of the frame body, and the controller is mounted on the frame body. Installation holes are formed in the two ends of the frame body, the connecting pieces are installed on the frame body through the installation holes, and the protective frame is arranged on the periphery of the eyelid poking assembly. By means of the symmetrical characteristics of the human face and cooperation of the liquid dropping assembly, liquid dropping work can be conducted on the first window and the second window, and therefore the use cost is reduced, and by arranging the eyelid pulling assembly, upper eyelids and lower eyelids can be actively separated and kept.

The invention discloses eyedrops as well as a preparation method and application thereof. Based on 100 percent of the mass of the eyedrops, the eyedrops comprise the following components: 4.5 to 6.0 percent of ginger leaching liquid, 6.5 to 8.0 percent of wild chrysanthemum flower leaching liquid, 5.0 to 6.5 percent of sowthistle tasselflower herb leaching liquid, 3.0 to 7 percent of mint leachingliquid, 15 to 20 percent of borax and 55 to 65 percent of boric acid. The eyedrops provided by the invention are eyedrops with traditional Chinese medicine property and has the effects of nourishingoptic nerve, reducing eye fatigue, eliminating dry eyes and improving eyesight so as to fulfill the aim of correcting pseudomyopia.

The invention discloses an ophthalmic liquid for relieving eye sore, which relates to a medicine and is mainly used for solving the problem of eye acid swelling caused by various reasons. The ophthalmic liquid comprises the following raw materials in parts by weight: hydroxypropyl methyl cellulose 7-11 parts, lutein ester 4-9 parts, vitamin A 1.5-2.7 parts, vitamin E 0.7-1.8 parts, Astragalus sinicus 3-8 parts, dandelion 5-10 parts, grape seed 1-4 parts, and viscosity promoter 0.5-1.1 parts. As the ophthalmic liquid of the invention adopts the mode of combining traditional Chinese medicine andwestern medicine, the ophthalmic liquid is prepared by using modern advanced pharmaceutical technology, and has the effect of clearing away heat, purging fire, relieving spasm and nebula, nourishingliver and improving eyesight under the synergistic effect of each component, and can effectively alleviate eye sore, and has remarkable curative effect.

The invention relates to an eyedrops which can protect eye and treat eye disease, and relative preparation, wherein said preparation comprises: adding potassium, sodium, bisilicate, calcium, magnesium, strontium, and zinc into distilled water and / or pure water to be dissolved; or using the natural mineral water that contains bisilicate, calcium, magnesium, and strontium to be added with sodium, potassium, calcium and zinc to adjust the PH value to 6.1-7.2, to be fill into eyedrops bottle, to be sealed. The invention can treat eye fatigue, near sight and cataract, etc.

The invention discloses a healthy eyedrop bottle which comprises a bottle body and a bottle cover, wherein a first limiting rod and a limiting plate are arranged on the bottle cover; a limiting part is arranged on the first limiting rod; pull ropes are connected with two ends of the limiting plate; the pull ropes are connected with clamping parts; a matching part is arranged on the bottle body; the matching part is used for supporting a transverse rod; a second limiting rod is arranged on the transverse rod; a top rod is arranged on the second limiting rod; a power supply component and a timerare arranged on the bottle body; the limiting part comprises a connecting rod and a first round rubber ball; the clamping parts comprise connecting blocks and insert needles; the matching part comprises a first spring and a sliding block; and the power supply component comprises a shell, a second spring, a first metal piece, a battery, a third limiting rod and a second metal piece. Due to adoption of an expire reminding structure on the eyedrop bottle in match, the time can be counted automatically after the eyedrop bottle is opened, the healthy eyedrop bottle is convenient to use, the potential health hazard caused by expire eyedrops can be eliminated, and the situation that waste is resulted if an eyedrop within an expire date is discarded is also avoided.

The invention relates to a liquid dropping device, in particular to a portable ophthalmology liquid dropping device. The technical problem of the invention is to provide the portable ophthalmology liquid dropping device which is convenient to carry, and eye drops are blocked in the carrying process and can be dripped out in a controlled amount. According to the technical scheme, the portable ophthalmology liquid dropping device comprises a shell, breathable plates, first connecting rods and distraction plates, the breathable plates are connected to the two backward sides of the shell, the distraction plates are slidably connected to the two sides, away from the breathable plates, of the shell, and the first connecting rods are rotatably connected to the two sides of the distraction plates; and first fixed sliding rails are arranged on the sides, facing the ventilation plates, of the opening plates. According to the eyedrop storage device, the clamping plate clamps or loosens the hose, eyedrops can be automatically stored in the storage bottle at intervals, then under the action of the opening plate, the effect of automatically opening the eyes of people can be achieved, the time cost of manual opening is saved, sanitation can be improved, and people can conveniently drip eyedrops.

The invention provides a deuterium-depleted water contact lens eye lotion and a preparation method thereof, and belongs to the technical field of ophthalmic liquid medicine. The deuterium-depleted water injection is prepared from the following raw materials in percentage by weight: 0.01-3% of an osmotic pressure regulator, 0.5-2% of immobilized hyaluronic acid, 0.01-5% of a buffering agent, 0.001-1% of a surfactant, 0.001-4% of a chelating agent, 0.000001-0.0001% of a preservative and the balance of deuterium-depleted water. The immobilized hyaluronic acid can exist in the eyes for a long time and has the effects of lubricating the contact lenses for a long time, inhibiting bacteria and keeping the eyes wet, so that the problems of dry eyes, bacterial infection and the like caused by wearing of the contact lenses are effectively avoided, the addition amount of a preservative is reduced, stimulation to the eyes is avoided, and the safety of the contact lenses is improved. Wide application prospects are realized.

The invention discloses a precise positioning ophthalmic drip device which structurally comprises a bottle hood, a bottle, anti-slip raised lines, a main device, hinges, fasteners, a flip cover, a bottle bottom, a partition plate, an open clamp slot and a card. The main device comprises a pressing transmission mechanism, a screw transmission mechanism, a cam transmission mechanism, a horizontal side pressure mechanism, a belt transmission mechanism, an auxiliary distraction mechanism, a medicine bottle cavity, eye drops and a liquid medicine outlet. The precise positioning ophthalmic drip device solves the problems that a traditional ophthalmic drip device is complicated in structure, troublesome in assembly and disassembly and inconvenient to use, and twinkling of patients cannot be controlled. The precise positioning ophthalmic drip device has the advantages that twinkling of the patients can be controlled, and the precise positioning ophthalmic drip device is simple in structure andconvenient to mount and use.

The invention discloses an ophthalmic nursing liquid medicine dripping device and a mounting and using method thereof, and relates to the technical field of ophthalmic nursing. An eyelid pressing silica gel plate is extruded and clamped into a fixed clamping plate; a propelling and dripping assembly is slidably mounted on a handheld rod, the upper side of a sliding body is fixedly connected with an extended fixed pipe, and a dripping pipe head is communicated with an upstream connector pipe; a liquid guide fixing assembly is fixedly mounted at the other side end of the handheld rod, the liquid guide fixing assembly comprises a fixed mounting piece fixedly connected with the handheld rod in a matched mode, a downstream liquid conveying opening pipe is arranged on the bottom side of the fixed mounting piece, and one end of the fixed mounting piece is connected with an end mounting cover body; the end mounting cover body comprises an end mounting groove and an injection port positioned at the bottom of the end mounting groove, the injection port is communicated with the downstream liquid conveying opening pipe, and the end mounting cover body is in threaded connection with a bag-shaped tail bottle; and the handheld rod is provided with a strip-shaped through slot. Eyedrops can be correctly dropped, and the intense foreign body sensation of an eyedrops bottle or a dropping device to the eyes when the eyedrops are dropped is also reduced.

The present invention provides a composition comprising a prostaglandin derivative and valproic acid or a pharmaceutically acceptable salt thereof and an ophthalmic liquid preparation comprising the composition, wherein the prostaglandin derivative is preferably latanoprost , bimatoprost, travoprost, tafluprost, unoprostone and latanoprostene, valproic acid or its pharmaceutically acceptable salts are preferably valproic acid, sodium valproate, diprostene One of sodium valproate and magnesium valproate. The composition provided by the invention can produce a synergistic effect of lowering ocular pressure, avoids the use of solubilizers, and improves the safety of medicines.

A self-standing packaging container capable of achieving both strength and disposability even if the container has a wide mouth is provided. A container according to the present invention includes: a container body that has an opening part at an upper end of a tubular member; an annular member that is bonded to the upper end of the tubular member; and a lid member that seals the opening part to be openable and closable. The container body has a bottom surface member that is bonded to the tubular member at a bottom surface part of the tubular member. The tubular member is constituted by a flexible laminated body of three or more layers including a barrier layer and a resin layer. The lid member is coupled to the annular member by any of a hinge, fitting, and a screw to be openable and closable.

The invention discloses a visible automatic ophthalmic care dropper, which comprises an eyedrop bottle, the upper surface of the eyedrop bottle is fixed with a threaded connection platform, the outer wall of the threaded connection platform is threaded with an adjustment block, and the top of the threaded connection platform is A conical block is fixedly connected, the top of the conical block is provided with a liquid outlet connected to the eyedrop bottle, the top of the outer wall of the eyedrop bottle is threadedly connected with a support ring, and the bottom end of the outer wall of the support ring is fixedly connected with a support plate And the start button opposite to the support plate, the upper surface of the support plate is fixedly connected with a fixed seat and a controller, the top of the fixed seat is fixedly connected with a miniature electric push rod, and the end of the miniature electric push rod away from the fixed seat is fixedly connected with a push rod. platen. The present invention is simple in structure, easy to operate, can accurately align the liquid outlet of the eyedrop bottle with the eyes, so that the patient's eyes can observe the liquid outlet, and the size of the medicine drop can be adjusted according to the patient's own needs, reducing the patient's anxiety about the drop. The fear of eye drops.

The invention discloses a method for preparing pH sensitive in-situ gel nano slow-release eye drop, which comprises the following steps of: wrapping ophthalmic medicaments in nano particles by using an emulsifying method to prepare medicament slow-release carriers, dispersing the medicament slow-release carriers in a pH sensitive liquid medium, and regulating the pH value, the osmotic pressure value and the like to obtain the pH sensitive in-situ gel nano slow-release eye drop. The eye drop prepared by the method has good pH sensitivity, biological adhesiveness and medicament long-acting slowrelease; the in vitro pH value is 4.0 to 4.5; the eye drop is liquid with good mobility and low viscosity; after the eye drop is dropped into the eye, the pH value is raised to about 7.4, the liquid preparation is quickly gelled in situ, the nano particle medicament carriers are immobilized therein and medicaments are slowly released, so the detention time of the medicaments in the eye can be increased, the bioavailability of the medicaments is improved, the frequency of eye medicament administration is reduced, and the eye drop has low stimulus at the same time.

The invention discloses an eye drop bottle with an expiration reminding structure. The eye drop bottle comprises a bottle, a connecting block, a liquid outlet tube and a bottle cap. The connecting block is fixedly arranged on the bottle, the liquid outlet tube sequentially penetrates the connecting block and the bottle and extends into an inner cavity of the bottle, a through hole is formed in thebottle cap, a transparent block is embedded in the through hole, linear marks are arranged on the transparent block in the perpendicular directions, the expiration reminding structure is arranged onthe inner wall of the bottle cap, a groove is formed in the connecting block, and a positioning structure and a pushing structure are arranged in the groove; the expiration reminding structure comprises a transparent liquid storage tank, a rubber block sealing assembly and a water absorbent resin ball; the positioning structure comprises a slider, a first rack and a spring; the pushing structure comprises a pushing block, a rubber rod, a support column and a second rack. The eye drop bottle has the advantages that the expiration reminding structure is fittingly arranged on the eye drop bottle,accordingly, the eye drop bottle is simple in structure and convenient to use, health risks due to use of expired eye drop can be eliminated, and wastage due to the fact that unexpired eye drop is thrown away can be prevented.