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Episcleritis is a benign, self-limiting inflammatory disease affecting part of the eye called the episclera. The episclera is a thin layer of tissue that lies between the conjunctiva and the connective tissue layer that forms the white of the eye ( sclera ).
The pain of episcleritis is less severe than in scleritis. [4] In hyperemia, there is a visible increase in the blood flow to the sclera ( hyperaemia ), which accounts for the redness of the eye. Unlike in conjunctivitis, this redness will not move with gentle pressure to the conjunctiva.
The episclera is the outermost layer of the sclera (the white of the eye). [1] It is composed of loose, fibrous, elastic tissue and attaches to Tenon's capsule. [1]A vascular plexus is found between the bulbar conjunctiva and the sclera consisting of two layers of vessels, the superficial episcleral vessels and the deep episcleral vessels.
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Episcleritis is a generally benign condition of the episclera causing eye redness. Scleritis is a serious inflammatory disease of the sclera causing redness of the sclera often progressing to purple. Yellowing or a light green color of the sclera is a visual symptom of jaundice .
Central retinal artery occlusion: CRAO is characterized by painless, acute vision loss in one eye. [11]Central retinal vein occlusion: CRVO causes sudden, painless vision loss that can be mild to severe.
A limbal nodule is any nodular lesion at the limbus (junction of the cornea and sclera) of the eye.. The differential diagnosis for a limbal nodule can include: . Pinguecula; Early Pterygium
This is the most common type found in postmenopausal women. [13] [17] In many cases, aqueous deficient dry eye may have no apparent cause . Other causes include congenital alacrima, xerophthalmia, lacrimal gland ablation, and sensory denervation. [14]