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Biomedical subjects

G D Burton

Publications and source records attributed to G D Burton.

8 recordsLinked to original sources
PubMed1989

Laser trabeculoplasty retreatment.

Thirty-seven eyes of 30 patients classified as late treatment failures following 360 degrees of argon laser trabeculoplasty (ALT) underwent retreatment of the trabecular meshwork. Retreatment was considered successful if the intraocular pressure was maintained at 21 mm Hg or below and if the visual fields and optic nerve remained stable. By the Kaplan-Meier survival analysis the rates of success were: 100% at 3 months, 91% at 6 months, 77% at 9 months; 70% at 1 year, and 47% at 16 and 20 months. The mean decrease in intraocular pressure 1 month after retreatment was 6.5 +/- 4.9 mm Hg (from 23.9 to 17.5). Three patients followed for 3 years or longer had a mean decrease of -5.67 mm Hg. Repeat argon laser trabeculoplasty appears to be a reasonable treatment option for selected patients who are late failures after initial treatment.

Aged↗
PubMed1981

Aerobic responses of the cornea to ophthalmic preservatives, measured in vivo.

A micropolarographic system was used to measure the effects of several concentrations of benzalkonium chloride and thimerosal on oxygen uptake by the cornea. Although the threshold of 0.01% found for benzalkonium chloride generally agreed with other criteria (e.g., clinical and histologic) in the current literature, the threshold for thimerosal was somewhat higher, 1.0%, indicating a substantially greater aerobic activity tolerance of the cornea to initial direct exposures of that agent then to benzalkonium chloride.

Animals↗