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Sclera

The sclera, also known as the white of the eye, is the opaque, fibrous, protective, outer layer of the eye containing collagen and elastic fiber. In humans the whole sclera is white, contrasting…

Scleral contact lenses

The diameter of the lens (LID) is up to 25 mm – compared with the corneal contact lenses. It is the first type of contact lens that has been…

Slit lamp

This is a biomicroscope with an optical system used to exam the anterior segment and posterior segment of the eye. With its help various…

Stenopeic contact lenses

Stenopeic contact lenses have a totally transparent substrate and only a small hole through which concentrates the sun's rays and which can be seen. These contact lenses can help in…

Strabismus (Squinting)

Strabismus, also called squinting, describes a condition in which the eyes do not…

Striae

For users of soft contact lenses corneal edema manifests as a formation of stretch marks in the rear part of the stroma. They have a white-gray color…

Sunglasses Bridge Size

Bridge or bridge width or bridge size is the area that arches up between the lenses over the nose and supports the majority of the weight of the glasses. The bridge measurement is the distance…

Sunglasses Nose pads

Nose pads are soft plastic pieces that are attached directly to the frame or to the pad arms. They help to keep the frame in its proper position on your face, while ensuring that the shades fit…