Eye Care Blog

The retinae are the sensory parts of the eyes, and to all intents and purposes may be regarded as a part of the brain. At the embryonic stage the developing brain very early on grows two buds which will become the eyes. This brain tissue gradually transforms into the light-sensitive retinae, or receptor organs. In the young foetus the buds lie just below the skin surface. The forward part of the eye tissue then invaginates to form the crystal lens of the eye, while the skin forms the cornea, or front lens of the eye. Slowly each bud is extended away from the brain, until it is only attached to the brain by a stalk, or optic nerve. Read the rest of this entry »

Orthokeratology

The term orthokeratology comes from the words ortho, meaning “straight,” and keratology, relating to the cornea. It should come as no surprise then that this form of vision therapy seeks to actually change the curvature of the cornea—in order to lessen the refractive error. Using much the same principle as an orthodontist employs when using braces to correct the position of wayward teeth, orthokeratology utilizes a series of relatively flat, hard PMMA contact lenses to mold the cornea gradually into the desired shape. Read the rest of this entry »