摘要:
Molded ophthalmic condensing lens with improved optical qualities can be manufactured at high volumes at low costs to provide single-use lenses. These ophthalmic lenses have a shape differing from known lenses of a similar type to reduce production costs and improve the optical quality of the lens.
摘要:
A retinal imager (1000) for imaging a retina of an eye (1010) includes an illumination source (1020) operable to generate illumination light and a beam splitter (520) operable to receive the illumination light and direct the illumination light along an optical axis. The retinal imager also includes a field lens (512, 1120) disposed along the optical axis and an objective lens (510) disposed along the optical axis and operable to contact a cornea of the eye. An aerial image is formed adjacent to the field lens (512, 1120). The retinal imager further includes an image sensor (562) and one or more lenses (540) disposed along the optical axis between the beam splitter (520) and the image sensor (562). The one or more lenses (540) are operable to form a sensor image at the image sensor (562).
摘要:
An ophthalmic is injection molded and/or, compression molded to provide a single use lens. An exemplary ophthalmic lens may comprise: a grip portion, an eye contacting portion and a main body portion disposed between the grip portion and the eye contacting portion wherein the grip portion, the eye contacting portion and the main body portion are integrally formed of an polymethylmethacrylate having a specific gravity of 1.1-1.8, the eye contacting portion is shaped to contact the cornea of the eye, and the main body portion has a curved sidewall with an arc extending in a direction from the grip portion towards the eye contacting portion, the arc having a length that is at least 1.15 times the length of a chord of the arc and the main body having at least one mirror surface for reflecting light to and from the eye contacting portion.
摘要:
Single piece ophthalmic inspection devices are provided having a continuous 3-dimensional molded surface preferably made out of plastic. The devices are relatively easier and cheaper to manufacture than existing inspection lenses. The smooth continuous edges are advantages to prevent damage to tissue as well to stop foreign objects accumulating in e.g. the clear regions of the lens. Ergonomic features are built into the ophthalmic inspection device provide for superior control of the device on the patient's eye. In addition, textured knurled or grooved surface provide desired finger grip and control of the device.
摘要:
Portable optical coherence tomography (OCT) devices including at least one mirror configured to scan at least two directions are provided. The portable OCT devices are configured to provide a portable interface to a sample that can be aligned to the sample without repositioning the sample. Related systems are also provided.
摘要:
An eye imaging system having a portable image capture unit having a circular light guide (50) positioned adjacent to and behind a corneal contact lens (24) for controlling directing light over a wide field to the retina of an eye and provide more light toward the center of the eye.
摘要:
The invention relates to a device (1.3) for examining and/or treating an eye (15). Said device comprises a base body (2.3) and an attachment body (3.3), which can be combined and applied to the eye, a gel-type liquid (14) being introduced between the two bodies so that the indices can be matched. To allow air or excess liquid between the two bodies to escape, the interior of the attachment body is provided with a large number of protuberances (13.1), which ensure a minimum distance is maintained between the two bodies. As only the attachment body comes into contact with the eye or the patient during examination/treatment and not the base body, only the attachment body must be manufactured so that it can be sterilised, a single sterilisation that is integrated into the production process being sufficient. The attachment body can be produced from cheap materials in a simple manner as a disposable item. The base body on the other hand only requires disinfection. This division of the device also allows a large number of base bodies with different configurations to be used with one single attachment body, or a large number of attachment bodies with different configurations to be used with one single base body. A large number of different eye examinations or treatments can thus be carried out using a small number of base or attachment bodies with different configurations.
摘要:
A self-adhering contact lens made of flexible material for adhering to cornea and scleral regions of the eye includes a central lens portion optically shaped for viewing interior regions of the eye. The central lens portion has an interior concave surface with a radius of curvature R1 for contacting the cornea. An outer flange formed integrally with the central lens portion extends radially outwardly from the central lens portion. The outer flange has an interior concave surface extending from the interior concave surface of the central lens portion. The interior concave surface of the outer flange is designed to contact the sclera and has a radius of curvature R2 that is greater than the radius R1. The outer flange is shaped for deflecting relative to the central lens portion for conforming the interior concave surface of the outer flange to the sclera.