H• eine described the use of cyclodialysis in the treatment of glaucoma in 1905. Salus, Elschnig, Barkan, and Sugar,' suggested that the effect of cyclodialysis depended upon the improvement in facility of outflow and/or decrease in aqueous formation. Kronfeld believed the mechanism of action of cyclodialysis eyes with relative hypotony was due to "a greatly reduced rate of formation of aqueous...

The present form of the Mackay-Marg tonometer consists of a 1.5 mm. diameter fat-based plunger mounted essentially flush with a flat footplate. The rubber mounting of the plunger acts as a stiff spring. Pressure measurements are derived from intraocular pressure acting through the flattened cornea against the plunger and causing microplunger movements. It has been shown that the response of thi...

PURPOSE To examine the interrelationships among the Ocular Response Analyzer (ORA; Reichert Ophthalmic Instruments, Buffalo, NY), Goldmann applanation tonometer (GAT), and corneal geometry measurements in a young, healthy sample. METHODS Central corneal radius, ORA, GAT, and central corneal thickness (CCT) measurements were taken in 99 subjects (age, 21 ± 2 years) who were free of ocular and ...