130 results about "Blur vision" patented technology

The present invention relates to oxygenated ophthalmic topical compositions and methods of administering oxygenated ophthalmic topical compositions. The present invention also encompasses methods for making and administering the oxygenated ophthalmic topical compositions for use in treating or ameliorating pathologic conditions, complications, diseases and symptoms related to hypoxia of the anterior eye structure, including corneal neovascularization (CNV), edema, abrasions, infections, infiltrates, dry eye syndrome, contact lens intolerance; and redness, blurred vision, discomfort, foreign body sensation, photophobia, and irritation.

The invention provides a variable-focus optical system and a head-up display system. The variable-focus optical system comprises a luminescent screen, a lens, a secondary mirror and a primary mirror, wherein any one of the lens, the secondary mirror and the primary mirror can move back and forth along an optical axis so as to adjust the focal length of the variable-focus optical system. The head-up display system comprises the variable-focus optical system. The head-up display system further comprises a speed acquisition module and a focal length adjustment module, the focal length of the optical system can be adjusted in real time by the focal length adjustment module according to vehicle speed information acquired by the speed acquisition module, or the focal length of the variable-focus optical system is manually adjusted according to user requirements. The variable-focus optical system and the head-up display system can effectively reduce defocus and blurred vision of a driver caused by vehicle speed variation and focus movement.

The invention discloses an eye protection Chinese medicinal composition with health care and treatment effects. The Chinese medicinal composition comprises the following components in parts by weight: 5-20 parts of ginkgo biloba leaf extract, 5-10 parts of ginseng, 5-10 parts of Chinese angelica, 5-10 parts of buerger pipewort flower, 5-20 parts of astragalus, 5-10 parts of honeysuckle flower, 5-10 parts of cicada shell, 5-15 parts of Chinese wolfberry and 5-10 parts of mint. The Chinese medicinal composition has the effects of relieving asthenopia, eliminating uncomfortable symptoms such as dryness, redness and swelling of eyes, blurred vision and the like, dispelling pouch, black eye, eye wrinkle and the like.

The invention discloses an asthenopia-relieving healthcare food and a preparation method thereof. The healthcare food comprises the following main raw materials: 0.5-10 parts of medlar, 0.1-6 parts of chrysanthemum, 0.5-10 parts of a bilberry extract and 0.005-0.08 part of lutein. The raw materials are extracted, concentrated and dried to prepare lozenges, capsules or granules. The healthcare food contains various nutrients necessary to eyes, has the effects of relieving asthenopia and improving eyesight, can be used for relieving symptoms such as eye pain, soreness, swelling, burning sensation, foreign body sensation, tearing, photaesthesia, blurred vision and eye dryness, is a traditional Chinese medicine preparation with homology of medicine and food, and is safe to take.

The embodiment of the invention discloses a lane deviation early warning and driving recording system and a lane deviation early warning and driving recording method. In the system, a near infrared light source is matched with an optical filter to illuminate a lane; because the near infrared is non-visible light, near infrared can be used at night, does not influence the visual field of vehicles and pedestrians on the road surface and can illuminate the lane; lane image information is acquired by an image sensor; lane line information is acquired by an image processing device according to preset lane characteristic parameters; and the current vehicle position information is compared with the lane line information obtained through calculation to judge whether a driving vehicle is deviated from the lane, and an alarm is given when the vehicle is deviated from the lane. The system and the method overcome the defect that a condition that the vehicle is deviated from the correct driving lane cannot be prevented when a driver is fatigue or has blurred vision under insufficient light, particularly at night in the prior art, fulfill the aim of recording the driving state in all weather, can reproduce the process of an accident according to stored image information and is favorable for judging the cause of the accident.

The invention discloses fructus akebiae healthy tea which is prepared from fructus akebiae,narrow-leaved oleaster fruit, marigold, green alectoria filament, rhodobryum giganteum, and Siberian nitrari in a certain weight proportion. The healthy tea has the purposes of dispersing the liver depression, promoting blood circulation to stop pain, tranquilizing and allaying excitement, relieving heart to treat eye disease, and strengthening by means of tonics. Owing to low cost, good effect, reasonable formula, easy preparation, simple preservation, being suitable for four seasons, curing diseases and protecting health, convenient drinking and good taste, the healthy tea is applicable to those who suffer from diseases such as liver and stomach pains due to disorder of qi, stomach heat and poor appetite, dyspepsia, soothing liver and tonifying kidney, strengthening spleen and stomach, invigorating spleen and stomach, body weakness, cough due to lung-heat, dizziness and blurred vision, infantile convulsion, cold and cough, neurasthenic, body emaciation, deficiency of both qi and blood, dyspepsia, abnormal menstruation, etc., on which the healthy tea performs good effects. The fructus akebiae healthy tea is an ideal healthy drink.

The invention discloses soybean milk containing raisins. The soybean milk is characterized by comprising the following raw materials in parts by weight: 80-85 parts of soybeans, 10-15 parts of red beans, 10-12 parts of peanuts, 6-8 parts of oat, 3-4 parts of red dates, 1-2 parts of raisins, 1-2 parts of haw slices, 1-2 parts of rehmannia glutinosa (gaertn.) libosch, 2-4 parts of barbary wolfberry fruit, 1-2 parts of xylan, 1-2 parts of snake gourd fruit leaves, 0.8-1 part of sodium citrate, 1-2 parts of soybean oil, 0.3-0.5 part of sodium carboxymethyl cellulose, 0.01-0.02 part of vitamin C and a proper amount of water. The soybean milk has the advantages that the soybean milk is converted from a single soybean milk edible to an edible with health care functionality at the same time; the added barbary wolfberry fruit has the functions of nourishing the liver and kidney and moistening the lung and is mainly used for treating deficiency of liver and kidney, dizziness, blurred vision, soreness and weakness of waists and knees, impotence, cough due to the consumptive disease and thirst due to diabetes; the added rehmannia glutinosa (gaertn.) libosch has the functions of treating diabetes and lumbar pain due to kidney asthenia and the like; and the soybean milk absolutely has the characteristics of engineering functional ingredients, nutrition functional ingredients and prepared food base materials.

The invention discloses health-care noodles made of mung bean hulls and a production method of the noodles, which belong to the technical field of food processing. According to the invention, the mung bean hulls are used for producing the health-care noodles through comprehensive utilization. The health-care noodles are prepared by adopting the mung bean hulls and high-gluten wheat flour as main materials, adding auxiliary materials such as edible gum, nano calcium and polylysine, mixing the flour, rolling, cutting, steaming, drying, cooling and packaging. The health-care noodles disclosed by the invention have the advantages that special treatment is carried out on the mung bean hulls, and the prepared noodles are fine in taste and free of rough taste of fibers, have health-care functions of clearing summer heat, quenching thirst, inducing diuresis, detoxifying, eliminating blurred vision, preventing colon cancer, breast cancer, coronary heart disease and diabetes and the like, and are especially suitable for middle-edged and old people. The production method has the advantages that the process is simple, energy is saved, the operability is strong, industrial production can be realized and the popularization and the application are easy.

The invention provides a health-care cornus officinalis tea capable of improving the immunity. The health-care cornus officinalis tea is prepared from the following raw materials in parts by weight: 10-50 parts of cornus officinalis, 10-20 parts of cortex lycii radicis, 10-20 parts of atractylodes macrocephala koidz, 10-20 parts of radix rehmanniae preparata, 10-20 parts of curculigo orchioides, 10-20 parts of epimedium, 10-20 parts of codonopsis pilosula, 10-20 parts of astragalus membranaceus, 10-20 parts of astragalus complanatus, 10-20 parts of fructus schizandrae, 10-20 parts of cortex albiziae, 10-20 parts of fructus rubi, 10-20 parts of poria cocos, 10-20 parts of radix polygoni multiflori preparata and 10-20 parts of asparagus cochinchinensis. The cornus officinalis can be used for tonifying the spleen, moistening the lung and reducing the lipid, reducing the blood fat, reducing the blood pressure, reducing the cholesterol, and reducing the blood sugar, so that the ingredients of the blood are purified. Traditional Chinese medicines which are mild in taste, and do not affect the taste of the cornus officinalis are added, and the cornus officinalis does not contain a foul and inedible taste of the traditional Chinese medicines, so that the cornus officinalis is easy to accept by people, can be drunk for a long period of time, and can well improve easiness in cold, eye acidity, poor sleep quality, spleen-insufficiency, hypodynamia, less eating and dry mouth, drinking and urine, kidney deficiency and soreness and weakness of the waist and the knees, frequent micturition at night, impotence and emission, tinnitus and blurring vision, premature graying of hairs, weakness, thinness, wind lecture and tinea of sub-health people.

The invention relates to a traditional Chinese medicine composition for vision rehabilitation and a preparation method thereof. In the prior art, the processes all have the problems that the processes are coarse, the prepared preparations are instable, the contents of active constituents are low and the treatment effect in the course of practical application is unsatisfied. The composition is prepared from the following 24 traditional Chinese medicines: antelope horn, caltrop, equisetum, chrysanthemum, plantain seed, selfheal, cassia seed, ginseng, cornel (prepared), dendrobe, wolfberry fruit, dodder, glossy privet fruit, abalone shell, coptis root, pipewort, fiveleaf akebia, prepared rehmannia root, yam, alisma, poria, moutan bark, radix rehmanniae and betel palm. The process is advanced, the content of active constituents is high and the preparation has good stability. The composition has the efficacies of nourishing liver and kidney, nourishing yin, promoting the production of the body fluid, removing heat from the liver, and improving eyesight, and is mainly used for patients having the symptoms of photophobia, blurred vision, glaucoma and primary and medium cataract caused bydeficiency of liver-yin and kidney-yin. The clinic pharmacodynamic test effect is obviously improved, the bioavailability is high and no toxic or side effect is generated.

The invention discloses a composition for preventing and treating asthenopia and a preparation method and application of the composition. Each 100 parts by weight of composition is prepared from the following raw materials in parts by weight: 10-40 parts of semen cassia, 5-30 parts of blueberries / bilberries, 10-30 parts of lutein ester / lutein / lutein ester microcapsule powder, 10-30 parts of purple perilla seed oil / perilla oil microcapsule powder, 1-15 parts of phospholipid, 1-15 parts of guarana extracts, 0.1-3 parts of taurine, 0.01-0.5 part of vitamin C and 0.001-0.1 part of vitamin A / beta carotene. The composition can be compounded with an adjuvant for preparing drugs, health products and foods for preventing and treating asthenopia. The composition has the effects of supplementing eyes with nutrients and preventing and treating asthenopia, and can be applied to prevention and treatment of diseases, such as asthenopia, eye dryness, foreign body sensation eyelids heaviness, blurred vision, photophobia, tears, eyeball dryness, eye pain and eye congestion.

The invention relates to health-preserving quinoa porridge, and belongs to the technical field of foods. The technical scheme adopted by the invention lies in that the health-preserving quinoa porridge consists of the following raw materials in parts by weight and in compounding ratio of main materials and auxiliary materials, wherein the main materials comprise 50-80 parts of millet and 20-50 parts of quinoa; the auxiliary materials comprise 5-10 parts of dried lily bulbs, 0-4 parts of Chinese wolfberry fruits, 0-4 parts of red jujubes and 0-4 parts of radix salviae miltiorrhizae. According to the health-preserving porridge, a dietetic invigoration recuperation manner is adopted, and reasonable compounding is adopted, so that absorption of various trace elements and minerals by human bodies is improved; besides, the auxiliary materials, such as the red jujubes and the Chinese wolfberry fruits are added, so that the efficacies of maintaining beauty and keeping young for females are strengthened; the millet, the quinoa and the dried lily bulbs are correspondingly compounded in proportion according to different populations, so that the needs for the amino acids, the trace elements and the minerals of human bodies are effectively and reasonably met, the nutrient value is increased, the consumption cost of people is reduced, and besides, the effects of reducing blood pressure, blood lipid and blood sugar can also be achieved; the dried lily bulbs and the Chinese wolfberry fruits are added together, so that the effects of treating a cough with lung heat, palpitation, insomnia, dreaminess, and blur vision can be achieved.

The invention which relates to a medicinal composition for treating ophthalmic diseases and a preparation method thereof belongs to the field of traditional Chinese medicines. The medicinal composition is prepared from the following raw medicines, by weight, 10-50 parts of pearl, 1-10 parts of chrysanthemum, 1-10 parts of coptis, 0.1-5 parts of bear gall, 1-10 parts of abalone shell, 1-10 parts of Radix Rehmanniae Praeparata and 0.1-5 parts of borneol. The medicinal composition is a medicinal composition for treating ophthalmic diseases comprising cataract and asthenopia which have symptoms of eyestrain, eye acerbity and distending pain, eye dryness, blurred vision, and the like.

The invention discloses a medicament for improving eyesight. In the medicament, szechuan tangshen root, astragalus, large-headed atractylodes, Chinese angelica, rehmanniae vaporata, red paneoy root, rehmanniae praeparatum, gardenia fruit, medlar, eucommia bark, south dodder seed, raspberry, root of red-rooted salvia, notoginseng root, pale butterflybush flower, blackend swallowwort root, fish poison yarn and chrysanthemum are ground into 200-mesh powder, and are mixed uniformly, sterilized and packaged, wherein each bag contains 5 grams of medicament. The medicament is mainly used for treating patients who suffer from blurred vision caused by symptoms such as deficiency in kidney and yang, deficiency in blood and qi, diabetes mellitus, retinopathy, fundus hemorrhage, vitreous opacity, glaucoma or optic nerve pathological changes and the like, and 50 patients who suffer from the blurred vision are selected in the outpatient service of a hospital randomly to take the medicament. In the administration method and dosage, adults take twice every day, and takes 5 grams every time; for the children, the dosage is reduced by half; and 20 days is one treatment course, the total cure rate is 69 percent, the total cure rate of two treatment courses is 86.3, and the cure rate of three treatment course is 97.2 percent.

The invention discloses composite fructus phyllanthi powder and a preparation method thereof. The composite fructus phyllanthi powder is prepared from the following raw materials by mass percent: 80-92% of fresh fructus phyllanthi fruit, 0.8-1.5% of liquorice root, 2-5% of siraitia grosvenorii superfine powder, 1-3% of barbary wolfberry fruit, 1-3.5% of sea buckthorn fruit and 3-8% of auxiliary materials. The composite fructus phyllanthi powder has the characteristics of mellow taste, sweet aftertaste, abundant nutrients, beautiful color, low possibility of moisture regain, and the like, has the effects of removing heat to cool blood, promoting digestion and strengthening the stomach, promoting the production of body fluid and relieving a cough, lubricating the intestines and eliminating toxins, tendering the skin and benefiting the appearance, moistening the lung for removing phlegm, tonifying the spleen and qi and relieving spasm and pain, can be used for treating the symptoms, such as weakness of the spleen and the stomach, burnout and lack of power, palpitation and shortness of breath, cough and excessive phlegm, consumptive diseases of the epigastrium and abdomen and essence insufficiency, chlorosis due to blood deficiency and blurred vision, and has obvious effects of relieving cough and asthma, treating chronic tracheitis, gastric and duodenal ulcers, dyspepsia, and the like, promoting longevity, retaining youthful looks and pleasant countenance, building body and delaying senility.

The invention discloses an indoor scene monocular vision space recognition method in a terrestrial gravity field environment. The method is characterized by comprising the following steps that first, ultra-pixel image segmentation based on pixel colors and spatial positions is carried out on an image; second, further clustering is carried out on the ultra-pixel image through a color space spectral clustering method based on human vision multi-scale perception characteristics, spectral clustering based on profiles and forms is carried out on color classification image blocks, initial space classification of an indoor scene is carried out through an outdoor gravity field blurred vision distribution density function, the image blocks with strong facade profile characteristics are classified into facades through the Manhattan strength characteristic, the boundaries between a ceiling and the facades and boundaries between the ground and the facades are searched for on the basis of the indoor scene perspective principle, indoor scene image space recognition is carried out through the indoor gravity field blurred vision distribution density function, and indoor space is marked on the basis of the ground and ceiling perspective principle to generate a depth graph. The indoor scene monocular vision space recognition method in the terrestrial gravity field environment is high in practicability and robustness.

The invention discloses an efficient and quick cleaning device of a display. The efficient and quick cleaning device comprises two shells, wherein the two shells are symmetrical from left to right, two adjusting cavities which are symmetrical up and down and are open to the display are respectively formed in the two shells, movable blocks are arranged on the inner walls of the adjusting cavities up and down in a sliding mode, jackets which can be clamped on four corners of the periphery of the display are respectively fixed to the side surfaces, which are close to the outside, of the movable blocks, and an adjusting mechanism which can be used for adjusting the left-and-right width so as to adapt to different displays is arranged between the two left and right jackets. The efficient and quick cleaning device can adapt to the displays of different sizes and has the advantages of good applicability, high degree of automation and good linkage effect, a screen of the display can be cleanedin a wiping and washing mode, time and human cost which are consumed by manual scrubbing can be effectively reduced, additionally, cleaning can be performed at any time, and the condition of damage to eyes or blurred vision because the screen of the display is dirty does not need to be worried.

An evidence-based, personalized, diabetes self-care information system and method to better ensure improved personal management, outcomes and health status across time, including the steps of:(a) Step 1 Take a measurement, for example, a Blood Glucose measurement;(b) Step 2 Identify symptoms, for example, blurred vision;(c) Step 3 Identify possible abnormal causes, for example, wrong dose;(d) Step 4 Identify actual treatments, for example, Glucagon injection;(e) Step 5 Identify actual results, for example, a blood glucose measurement closer to the normal range.

The present invention provides medicaments for treating or preventing a disease, disorder, or condition associated with extracellular matrix (ECM) abnormality in a corneal endothelium, wherein the medicaments comprise a TGF-beta signal inhibiting agent. More specifically, this disease, disorder, or condition is a disorder associated with Fuchs' endothelial corneal dystrophy. Such a disorder includes photophobia, blurred vision, vision disorder, eye pain, lacrimation, hyperemia, pain, bullous keratopathy, ophthalmic unpleasantness, a decrease in contrast, glare, edema in corneal stroma, bullous keratopathy, corneal opacity, and the like. A preferable TGF-beta signal inhibiting agent includes 4-[4-(1,3-benzodioxol-5-yl)-5-(2-pyridinyl)-1H-imidazol-2-yl]benzamide.

The invention relates to middle-tempering and qi-tonifying bread, which overcomes the defects that the conventional bread has poor mouthfeel and low rigidity and softness and can only solve the hungry problem and most of nutrient components in the conventional bread cannot be absorbed completely by a human body. The bread is prepared by the following steps of: mixing flour, tangerine peel, ginseng, liquoric root, phellodendron (washing with rice wine), sugar and baking powder and shaping; placing the mixture for 20 to 40 minutes; and putting into an oven for baking. The middle-tempering and qi-tonifying bread has the effects of tempering middle and opening yang, tonifyimg qi and raising the fall, curing heaving body and fatigued limbs, dysphoria and shortness of breath and the like caused by poor qi of middle-Jiao, absorption breakdown, clearness promotion and turbidness demotion and curing qi depression and transformation into heat, dryness of the throat, blurred vision and hot body, and can be used for good food nutrient supply in daily diet; and the nutrient components can be absorbed well.

The invention discloses milk tea powder. The milk tea powder comprises the following components, by mass, 40-60% of fresh milk, 20-25% of white granulated sugar, 20-30% of oil powder, 5-8% of mung bean, and 0.005-0.01% of a chrysanthemum tea. An efficacy singleness problem of present milk tea powder is solved in the invention, and the milk tea powder which allows chrysanthemum tea raw materials to be added to milk tea powder fully performs eye fatigue and blurred vision treating efficacies of the chrysanthemum tea when humans drink milk teas for thirst quenching, and provides a guarantee for the human health.

A health-care tea for the patients of hypertension, dizziness, cold fever, headache, insomnia, blurred vision etc is proportionally prepared from honeysuckle flower, wild chrysanthemum flower, jasemine flower, chrysanthemum flower and sophora flower.

The invention belongs to the technical field of biological medicines and in particular relates to an acremonium terricola culture and application thereof. The acremonium terricola culture provided by the invention can effectively alleviate visual fatigue symptoms such as eye distension, sore eyes, photophobia, blurred vision, dry eyes and fading eyesight. The acremonium terricola culture provided by the invention is low in production cost, can be easily obtained in large scale and can be applied in preparation of medicines for relieving visual fatigue conveniently.

At present, people hunger for high-tech electronic products stronger and stronger, work with computers, also read electronic novels, chat with friends and play game with mobile phones and laptops in hand on the way home and keep surfing the Internet and watching TV in the evening. Under the radiation of the electronic products, people suffer from dry eyes, blurred vision, brain disorientation, mental weakness and the like, and the health of people is affected. An anti-radiation and eyesight-improvement health protection beverage provided by the invention is prepared from Chinese date, medlar, cordate houttuynia, hawthorn and chrysanthemum morifolium which are medicinal and edible, and has the effects of preventing radiation, nourishing the liver to improve visual acuity, adjusting immunity, tonifying Qi, strengthening energy, delaying aging, suppressing tumors, promoting the secretion of saliva or body fluid to quench the thirst. The raw materials are readily available; the processing technology is simple and easy to operate; the cost is low; the taste is pure; the anti-radiation and eyesight-improvement health protection beverage is popular and has considerable economical benefit.

The invention discloses a heat-clearing liver-nourishing butterflybush flower tea and a preparation method thereof, by enlightenment of the fact that Zhuang nationality people use butterflybush flower to soak rice to cook yellow flower rice as health food, butterflybush flower is tried to be used as tea to soak for drinking, butterflybush flower tea water is found to be used as a Chinese herb tea drink which is gold yellow in color, fragrant, delicious, refreshing and distinctive in flavour, has the heat-clearing, liver-nourishing and free coursing effects, and is suitable for people of all ages; further study shows that different butterflybush flower tea prepared by different methods has different effects, the butterflybush flower tea used with chrysanthemum, equisetum hiemale and the like can be used for treating sore red swollen eyes, photophobia, hyperdacryosis, liver deficiency, poor eyesight, visual dim and the like, and the butterflybush flower tea compatible with Chinese wolfberry seed, flatstem milkvetch seed, semen cuscutae and other medicines can be used for treating liver deficiency with heat, blurred vision and aningeresting eye, and is remarkable in curative effect.

The invention belongs to a health-care pillow inner and a preparation method thereof, and particularly relates to a blood pressure-reducing and eyesight-improving health-care medicine pillow inner and a preparation method thereof. The invention mainly solves the technical problems of long treatment courses and expensiveness existed in conventional methods and medicines for treating high blood pressure, vertigo, asthenopia and blurred vision. The technical scheme adopted by the invention is that the blood pressure-reducing and eyesight-improving health-care medicine pillow inner is prepared with the following materials according to weight ratio: 850 to 1100 parts of white chrysanthemum, 180 to 210 parts of radix angelicae, 150 to 240 parts of Szechuan lovage rhizome, 160 to 230 parts of tree peony root bark, 190 to 210 parts of glossy privet fruits and 170 to 220 parts of cassia seeds. The method for preparing the blood pressure-reducing and eyesight-improving health-care medicine pillow inner includes the following steps that each material is first weighed according to part by weight, and the materials are then respectively ground, uniformly mixed and bagged.

The invention provides artificial tear collyrium for relieving asthenopia. Persons who operate video terminals and watch screens for a long time have the symptoms of dry eyes, asthenopia, blurred vision and the like, which causes myopia aggravation and fixation function decrease, eyesight regulating capacity decrease, xerophthalmia and the like. The symptom of dry eyes is caused by insufficient tear, so that artificial tear is developed for relieving collyrium, and the formula adopting a pH buffer system is stable in property and mild in application, and is added with vitamin A, taurine and chloramphenicol to achieve the effects of preventing nyctalopia, enhancing eye resistance, sterilizing and removing bacteria.

The invention provides a combined air pressure type eyestrain recovery instrument. The combined air pressure type eyestrain recovery instrument comprises two spectacle frames, two lenses, two seal supporting rings, a Y-shaped connecting rubber tube, a hollow rubber ball and a fastening belt. The two spectacle frames are connected together through a cross beam. Air generated when the hollow rubber ball is pinched, pressed and loosened can massage the double eyes in a pulse mode, and the good effects of promoting fundus blood circulation, reliving eyestrain and relaxing the eyes are achieved. It is proved through a large number of use data with eyestrain and different lesions that the symptoms of shortsightedness, presbyopia, astigmatism and cataract are relieved, and especially the obvious relieving effect is achieved for the symptoms of dryness, obscurity, itches, blurred vision and the like caused by eye overuse. Power of the instrument is generated by squeezing the hollow rubber ball by a user with the hand, the whole process is quiet and silent, and the instrument can be used at any time. The instrument is completely made of environment-friendly medical materials, no smell or pollution is caused, and environment friendliness is achieved. The weight and size are similar to those of a pair of normal glasses, and the instrument is convenient to carry.