Primary Care of the Anterior Segment

Granular dystrophy of the cornea

“…8,9 The dystrophy originates in the subepithelial and anterior stromal region. 1 Later, it progresses to involve mid-Granular dystrophy of the cornea Collin and Hendicott stromal and posterior stromal layers.…”

Orbital Blood Supply

“…22 These vessels do not move with the conjunctiva and are not blanched with a topical vasoconstrictor. In cases of a "red eye," an understanding of the organization of the blood supply in the limbal area can help in differentiating a less serious presentation, such as conjunctivitis, from a more serious situation, such as uveitis.…”

“…33 It may form two branches: one that empties into either the superior ophthalmic vein 22,35 or the cavernous sinus and one that empties into the pterygoid venous plexus (see Figure 11-11). It drains blood from the lower and lateral muscles, the inferior conjunctiva, the lacrimal sac, and the inferior vortex veins.…”

Cranial Nerve Innervation of Ocular Structures

“…8 The nerve loop may be painful when touched, a characteristic that should aid in its diagnosis. Often this raised area is pigmented, usually blue or black, and should be differentiated from a melanoma.…”