Animal corneal contact lens for observing ocular fundus and assisting operation under microscope

Abstract

The invention discloses a corneal contact lens used for microscopically observing fundus and assisting with operation, comprising a cylinder-shaped lens body; both ends of the lens body are respectively provided with a corneal contact surface and a corneal optical surface. The diameter beta of the lens body is more than or equal to 5mm and less than or equal to 15mm and the height gamma of the lens body is more than or equal to 1.5mm and less than or equal to 7.5mm; the corneal contact surface has a smooth surface and blunt round edges; the shape of the corneal contact surface is an inner concave approximately matched with the outward-convex shape of the cornea; the curvature alpha of the inner concave is slightly larger than the corneal curvature of the experimental animal and is more than or equal to 2mm and less than or equal to 9mm; the optical surface is a smooth plane or incline; when the optical surface is an incline, the included angle delta between the incline and the plane is more than or equal to 0 degree and less than or equal to 60 degrees; the lens body is made of fiber plastics or glasses. The invention has the advantages of having simple structure, easy operation and stable imaging, having no damage to cornea, being suitable for cornea with various diameters and curvatures and making obvious progress in using two hands to carry out entoptic operations such as vitrectomy and retinal operation, etc.

Description

technical field [0001] The invention relates to a corneal contact lens for medical experiments, more specifically, the invention relates to an animal corneal contact lens for observing fundus under a microscope and assisting vitreoretinal surgery. Background technique [0002] As we all know, retinal detachment, diabetic retinopathy, retinal vein occlusion and other fundus diseases can seriously affect vision and even lead to blindness. At present, a large amount of research work on these diseases is being carried out in animal experiments (such as rats, mice, rabbits, cats, dogs, pigs, monkeys, etc.) to explore the disease mechanism and observe the efficacy of new treatment methods. Among them, animal fundus manipulation under a surgical microscope is the most basic method, and recording fundus changes under direct vision is the most important scientific evidence. However, since the animal's eyeball itself is highly hyperopic (such as about 78D in rats and about 62D in rab...

AI Technical Summary

Problems solved by technology

Although this method can achieve a certain effect, there are three problems: first, the degree of oppression is limited by the experience and physical strength of the researcher, and long-term oppression will make the imaging effect unstable; Mistakes; third, the compression method often causes damage to the corneal epithelium and changes the elasticity of the corneal stroma. Over time, it will also cause corneal

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