Download Manual of Contact Lens Prescribing and Fitting by Milton M. Hom, OD, FAAO, and Adrian S. Bruce, BScOptom, PhD, PDF

By Milton M. Hom, OD, FAAO, and Adrian S. Bruce, BScOptom, PhD, FAAO (Eds.)

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Sample text

Keratoplasty is the preferred treatment. 4 4. Climatic droplet keratopathy appears as fine, oily-appearing droplets at the limbal area. 4 5. Hyaline degeneration is indicated by yellowish-brown granular opacities appearing in the lower half of the cornea in the shape of a 36 BASIC CONCEPTS 6. 7. 8. IV. band. 3 Keloid formation is indicated by white deposits that result in excessive fibrocytic activity originating in the stromal cells. 3 Lipid degeneration is a whitish-yellow degeneration with feathery edges.

Corneal dystrophies are primary diseases of the cornea. 1-3 Corneal dystrophies are bilateral, symmetric, and mostly centrally located. They are avascular. Onset is early, usually during the first or second decade of life. Most dystrophies develop slowly or are stable so that visual acuity is not drastically changed throughout the lifespan. A few can result in debilitating visual function and can be painful, however. Most dystrophies primarily involve one layer of the cornea; some may involve more.

Melanotic cells can often penetrate far into the deeper cornea in response to stimuli such as trauma, infection, or epithelial breakdown. 3,4 A salmon patch is an orange discoloration of the midstroma in interstitial keratitis. 1,6 Sampaolesi’s line consists of pigment granules deposited at Schwalbe’s line. 1,4 Tattooing is variable coloration. 1 Vortex keratopathy or verticillata is a whorl-like deposition in the epithelium, usually centered in the lower third of the cornea (Fig. 2-7). It occurs as a rare congenital disorder unassociated with systemic disease.

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