| Abstrakt: |
A series of comparisons in normal and glaucomatous eyes, all with normal corneas, was made between Goldmann applanation tonometry and Langham pneumatonometry, central and limbal, and with the patient in sitting and supine positions. All measurements were made at one visit with a standardized sequence. All mean pneumatonograph measurements were significantly higher than the corresponding applanation value. However, no significant difference was found between limbal and apical pneumatonograph values in the supine subject. Conversion values relating pneumatonograph measurements and applanation values have been derived and designated as Clinical Correlation Estimators. This allows prediction of Goldmann applanation values by extrapolation of limbal pneumatonograph measurements at a 95% confidence level. The method has potential use in the determination of intraocular pressure in the presence of corneal disease. |
