31 results about "Ophthalmic optics" patented technology

An ophthalmic analysis apparatus is the ophthalmic analysis apparatus for obtaining analysis results of tomography images of a subject eye acquired at different dates by ophthalmic optical coherence tomography and outputting statistical information formed based on time-series data of the analysis results, and includes instruction receiving means for receiving selection instructions to select an analytical region on a subject eye from an examiner, and control means for respectively acquiring analysis results in the analytical region selected by the instruction receiving means with respect to tomography images acquired at the different dates and outputting the statistical information.

Anti-scratch coating composition containing anisotropic particles, a corresponding coated substrate and its application in ophthalmic optics

The invention relates to a calibration tool for an ophthalmology optical imaging and biological parameter measuring instrument and a using method of the calibration tool. The calibration tool comprises a first lens, a second lens and a PDMS mold body, wherein the first lens comprises a first curve and a first plane; the second lens comprises a second curve, a second plane and a third plane, and the second plane and the third plane are parallel; resolution ratio testing microspheres which are uniformly distributed are in the PDMS mold body; the first plane is attached to the second plane; the PDMS mold body is attached to the third plane and a part of the second curve; an empty chamber is formed between the third plane and the PDMS mold body; the first lens, the second lens, the PDMS mold body and the empty chamber are symmetric about the same axis; the curvature radius of the first lens is smaller than that of the second lens; a visual field angle scale and a resolution ratio line aligning pattern are arranged between the second curve and the PDMS mold body; and an image calibration line is arranged on the third plane.

The invention discloses an ophthalmic optical coherence tomography scanner and an eye scanning image acquisition method, and relates to the field of medical instruments. The ophthalmic optical coherence tomography scanner comprises a controller, a base, a driving mechanism arranged on the base and an optical head assembly arranged on the driving mechanism, wherein the optical head assembly is provided with an iris camera group; the controller can position the ocular surface according to an iris image, collected by the iris camera group, of a detected object and control the driving mechanism todrive the optical head assembly to move according to a positioning result, so that the optical head assembly can obtain an eye scanning image of the detected object. The position of the optical headassembly is automatically adjusted instead of being manually adjusted, so that the effect of improving the detection efficiency and precision of the optical head assembly is achieved.

The invention discloses a lying type ophthalmic optical observation bracket, and belongs to the technical field of ophthalmic medical equipment. The observation bracket includes a fixing base, a rotating rod I, a rotating rod II, a rotating joint, an optical support, and adjusting device and an optical observation device; an adjusting wheel is rotated to adjust angles and rotates to drive an adjusting screw rod to rotate; the adjusting screw rod is in screw transmission with a rotating wheel; the rotating wheel drives a shaft II to rotate; the shaft II rotates to drive a bevel gear II to rotate; and the bevel gear II is in meshing transmission with a bevel gear I. Thus, a cylindrical jacket frame is driven to rotate, and the purpose of adjusting optical observation angles and fixing the optical observation device can be achieved. The observation bracket is fixed on a hospital bed and can be dismounted, so that the observation bracket is convenient in transferring; the provided observation bracket is mainly applied when the observation device and patients cannot sit up during ophthalmic surgery; and the observation bracket is convenient in using and simple in operation.

The invention discloses a portable non-mydriasis fundus camera, and relates to the field of medical ophthalmic optics instruments. The portable non-mydriasis fundus camera comprises an optical systemand a control unit, wherein the optical system comprises a positioning light path, a focusing light path and an illumination imaging light path; a group of vari-focus lens and an image sensor are shared by the positioning light path, the focusing light path and the illumination imaging light path; the positioning light path and the focusing light path respectively comprise one or more dual-opticalwedges; and the control unit is used for controlling the positioning light path, the focusing light path and the illumination imaging light path, and is used for performing treatment on the shot fundus images. The portable non-mydriasis fundus camera disclosed by the invention is small in volume, and convenient to carry, can also realize quick positioning of working distance and accurate focusing, and the photo forming quality and photo forming rate are simultaneously guaranteed; and a user can safely and conveniently use the portable non-mydriasis fundus camera.

The invention relates to the field of ophthalmology imaging, in particular to an ophthalmic optical imaging diagnostic system. The ophthalmic optical imaging diagnostic system comprises a scanning imaging module, and the scanning imaging module comprises an anterior segment scanning imaging mode and a fundus scanning imaging mode; in the fundus scanning imaging mode, the scanning imaging module is sequentially provided with a first lens group, a second lens group and a third lens group along the emission direction of a light beam in an imaging light path; in the anterior segment scanning imaging mode, the first lens group and the third lens group are simultaneously removed from the scanning imaging module. According to the ophthalmic optical imaging diagnostic system, the anterior segment imaging mode and the fundus imaging mode can be switched by switching the lens group in one light path, normal functions and use of other light paths are not affected, and operation is simpler and more convenient.

The invention belongs to the field of ophthalmic optics, and provides a free-form surface single-focus astigmatism lens for hyperopia correction and a design method, the lens is a circular positive lens, the outer surface is a spherical surface or an aspheric surface, and the inner surface is a toroidal surface; the method comprises the following steps: firstly, comprehensively considering a single-eye independent pupil distance, a nose bridge width, a pupil height, a lens edge cutting margin, selected lens frame data and prescription parameters of a lens fitting person to obtain the minimum diameter of the lens; the cutter edge position is set according to the base arc position of the scattered sheet in the toroidal curved surface, so that the cutter edge position is close to the optical center of the lens as far as possible, the center thickness of the lens is reduced to the maximum extent, and the lens subjected to edge cutting and racking obtains the optimal light and thin effect; the inner surface of the lens adopts a toroidal curved surface design, so that off-axis aberration at the periphery of the lens is eliminated, the clear view field at the periphery of the lens is expanded, and the contrast sensitivity of imaging is enhanced; compared with an aspheric lens with an optical design surface on the outer surface, the aspheric lens has the advantage of comfort.

An ophthalmic optical testing system/method allowing human eye characteristics modeling and evaluation of a lens under test (LUT) is disclosed. The system and method incorporate an axial positioning platform (APP) allowing tip/tilt/rotation about a vertical or horizontal axis of an optical retention framework (ORF) containing a cassette support tower (CST). The CST retains a pupil lens fixture (PLF) incorporating pinhole or light blocking device (POL). The ORF mates to a corneal and test longitudinal axis positioning platforms (LAP) that are attached respectively to a corneal lens fixture (CLF) retaining corneal lens optics (CLO) and a test lens fixture (TLF) retaining an lens under test (LUF) and LUT. The LAPs allow longitudinal adjustment of lenses along a common optical axis (LOA) pathway. APP positioning, LAP adjustments, and selection of CLO/PLO/LUT permit LOA optical characteristics to be adjusted and tested.

The present invention relates to the field of ophthalmic optics, in particular a device (10) for measuring the optical effect of an ophthalmic lens (100), in particular a spectacle lens, arranged in ameasurement volume (200), the device comprising a display system (20) configured for displaying a test structure (21); an image acquisition system (30) configured for acquiring image data of the teststructure from multiple viewpoints (31, 31', 31"), using imaging optical paths (32) which pass through the lens (100); and a computer unit (40), wherein the computer unit is configured for: determining a three-dimensional shape of the lens (100) on the basis of the image data; and calculating an optical effect of the lens (100) on the basis of its three-dimensional shape, wherein the lens (100) is a spectacle lens and the optical effect of the spectacle lens is calculated for a predetermined wearing position by an user. The present invention further relates to a corresponding method and to acomputer program.

An optical system is capable observing a peripheral field away from a visual axis and includes a reflection mirror unit forming an image of an examined eye with two concave mirrors in an opposing arrangement facing each other at the examined eye side, this being the upstream side, of a first optical unit and a second optical unit. In the reflection unit there is a conjugate relationship between one focal point thereof and another focal point thereof. By forming an image of the examined eye using the reflection unit a distance can be secured between the examined eye and the optical system and a wide range of the examined eye can be observed.

The invention discloses a method and device for obtaining the optic disk area through ophthalmic optics coherence tomography images. The precise optic disk area is fast to obtain through the simple method and used for clinical analysis. The method comprises the steps that S101, the optic disk initial boundary circle is fitted after conversion is carried out on optic disk reference points of the multiple OCT images of an optic disk part many times; S102, moved coordinates of the k optic disk reference point are obtained through calculation and recorded into a storage container; S103, according to the moved coordinates of the k optic disk reference point, a refitted optic disk boundary circle is obtained by fitting the optic disk boundary circle; the S102 and the S103 are repeated, and all the optic disk reference points are moved to the correct position; S104, the area of the refitted optic disk boundary circle is calculated. The operation of selecting the optic disk reference points needing to be corrected is simple and accurate, the optic disk reference points found through the algorithm can be corrected to the accurate positions fast and conveniently, and accurate parameters like the optic disk area can be obtained through fast calculation after correction is finished.