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At least 1,441 records · Page 80Linked to original sources
PubMed1979

Elemental analysis of melanins from bovine hair, iris, choroid, and retinal pigment epithelium.

According to recent theory on the structure of melanin, the sulfur content of melanin is a reflection of the amount of cysteine used in its manufacture. We compared the sulfur contents of melanins from hair, choroid, iris, and retinal pigment epithelium from black-haired cattle and separately from red-haired cattle. In black-haired cattle, sulfur contents of hair and ocular melanins were all between 0.60% and 0.94%, however, in red-haired cattle, hair melanin had a sulfur content (8.66%) different from those of choroid (0.94%) or RPE (1.72%) MELANIN. One may conclude that in an individual animal, ocular melanins can have different chemical structures from hair melanins. The clinical importance of this finding is discussed with regard to sympathetic ophthalmia.

Animals↗
PubMed1979

[Contact lenses: indications and limits].

Contact lens wear may be indicated for cosmetic, professional, optical or therapeutic reasons. For each of these indications the arguments are given, why and when contact lenses are better than spectacle correction and which possibilities there are. Contact lens wear is contraindicated in certain eye diseases and in the case of problems of handling and hygiene. The author's preferences concerning the different contact lens materials are summarized briefly.

Aphakia↗
PubMed1979

Continuous wave argon laser iridectomy in angle-closure glaucoma.

Utilizing a continuous wave argon laser in a multiburn fashion, successful iridectomies were achieved in 42 of 45 phakic eyes with either acute or chronic angle-closure glaucoma. Five of the successful procedures required multiple sittings on different days or abandonment of the primary treatment site in favor of an alternate site to attain patency. Within the immediate postoperative period, ten eyes needed further treatment to eliminate moderate pigment proliferation at the perforation site. The procedure was performed on an outpatient basis under topical anesthesia, usually required less than one-half hour for completion, and resulted in only minimal complications. Therefore, CWAL iridectomy appears to present an alternative to surgical iridectomy for the definitive treatment of angle-closure glaucoma, although long-term evaluation of this modality of therapy is presently unavailable.

Adult↗
PubMed1979

Seidel's test using 10% fluorescein.

A 10% solution of fluorescein applied topically shows a leak from the anterior chamber better than a 2% solution. Fluorescein changes color because it is diluted by the leaking aqueous and not because its pH is changed.

Anterior Chamber↗