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Biomedical subjects

T E Clinch

Publications and source records attributed to T E Clinch.

25 records · Page 2Linked to original sources

Infected vs sterile corneal infiltrates in contact lens wearers.

We examined 50 patients to determine whether differences exist between the initial clinical signs and symptoms associated with infected vs sterile corneal infiltrates. A detailed history regarding contact lens use and ocular symptoms was taken, after which a careful slit-lamp examination was performed. The ocular findings were correlated with the results of corneal cultures. Increased pain (P less than .001), discharge (P less than .0001), epithelial staining (P less than .0001), and anterior chamber reaction (P less than .0001) were associated with infected ulcers. Sterile infiltrates were usually smaller; multiple or arcuate; and without significant pain, epithelial staining, or anterior chamber reaction.

Adolescent↗

Mooren's ulcer.

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Aged↗

Corneal endothelial cell loss following trephination.

The amount of endothelial cell loss that occurs to the donor cornea during the trephination process was evaluated in 40 porcine eyes. A vital staining technique (alizarin red S and acid violet 19) was used to quantify the extent of endothelial damage and removal. Two types of corneal punches (Weck and H&I0 were used for trephination. The average amount of endothelial loss from the peripheral cornea was 7.9%, accounting for only a 3% loss of endothelial cells over the total surface area of the corneal button. a comparison of the Weck and H&I corneal punches showed no significant difference (P greater than 0.1) by Student's test for both endothelial cell damage and removal.

Animals↗

In vivo observation of tear dynamics using fluorophotometry.

Fluorophotometry was used to evaluate the effect of the blinking process on tear spreading. In normal individuals, when the intensity of fluorescence was monitored over the central 1 mm of the cornea, forceful blinking was found to substantially increase tear film thickness. Weak blinking was found to decrease tear film thickness. When tear film fluorescence was monitored along different regions of the corneal vertical meridian, the tear film thickened superiorly while thinning inferiorly. It is postulated that the vertical spreading of meibomian oils is accompanied by the movement of a portion of the aqueous tear phase that thickens the superior tear film at the expense of thinning inferiorly.

Blinking↗

Schirmer's test. A closer look.

In 50 normal subjects, results of kinetics studies of Schirmer's test demonstrated nonlinear wetting with an initial rapid phase of wetting followed by a progressive reduction in rate. This initial rapid phase of wetting indicated a reflex secretion of tears. In the majority of subjects, topical anesthesia with 0.5% proparacaine hydrochloride dampened the initial reflex secretion but could not completely suppress it. The data indicated that Schirmer's test with anesthesia was not capable of measuring a basic tear secretion independent of reflex components.

Adult↗

Infantile endogenous Candida endophthalmitis presenting as a cataract.

The most common pathogen to cause endogenous endophthalmitis is the fungus Candida albicans. Most cases involve adults who are either immunosuppressed or have a history of repeated or prolonged extracorporeal access to their circulatory system. Endogenous Candida endophthalmitis can occur in infants as well, particularly when prematurity, broad spectrum antibiotic therapy, or prior surgery are present as predisposing factors. We report the clinical and histopathological findings of an infant who developed a unilateral, sectoral lens opacity four months after undergoing treatment for disseminated candidiasis. The diagnosis of localized intralenticular fungal abscess with associated endophthalmitis was made via histopathologic examination of the aspirated lens material. Treatment with systemic antifungal agents successfully preserved the eye. In addition, we review and summarize the previously reported cases of Candida endophthalmitis in patients under one year of age.

Amphotericin B↗