Comparative measurement of intraocular pressure by Rebound and non-contact tonometry in patients wearing bandage contact lenses after pterygium excision

Abstract

AIM: To compare the measurement of intraocular pressure(IOP)through a bandage contact lens with the “native” measurement by rebound tonometry and non-contact tonometry in patients after pterygium excision. METHODS: Fifty consecutive patients(50 eyes)undergone pterygium excision(unilateral nasal, primary pterygium, horizontal length RESULTS: With the rebound tonometry we detected statistically significant higher values in the contact lens measurements(18.20±3.19 vs 15.17±3.80mmHg in the native measurements; Pr=0.884 and mean difference was 3.04±1.79mmHg; With the non-contact tonometry we detected statistically significant higher values in the contact lens measurements(15.74±3.23 vs 13.19±3.89mmHg in the native measurements; Pr=0.876 and mean difference was 2.55±1.88mmHg. In the contact lens measurements and native measurements, we detected statistically significant higher values by Rebound tonometry than that by non-contact tonometry(PCONCLUSION: The use of rebound tonometry and non-contact tonometry shows good consistency between lens measurement and native measurement. However, it should be noted that the average of the measurements over contact lens by rebound tonometry and non-contact tonometry were found to be higher than that in native measurement, and the average of the measurements with and without lens by rebound tonometer was found to be higher than what was measured by non-contact tonometry.

Keywords

• pterygium excision
• bandage contact lens
• intraocular pressure
• rebound tonometry
• non-contact tonometry