Corning CPF filters for the preoperative cataract patient.

Visual acuity and subjective responses of 19 cataract patients were recorded to study the effect of the Corning CPF 511 and 527 filters in a simulated glare environment and outdoors in the "real world." The CPF filters did not produce a statistically significant improvement in visual acuity in the contraglare environment but subjectively, 68% of the participants felt that the CPF filters improved their vision and were interested in wearing the filters. This study suggests that the Corning CPF filters may provide visual enhancement for the cataract patient by improving subjective contrast and comfort, and reducing glare.