Approximately 100 patients will take part in a one time procedure and survey as part of this project. After appropriate consent patients are asked to complete a short 2 page survey about themselves and their eye drops. Then a video recording will be made of the patient instilling eye drops in their habitual manner. The eye drops used will be sterile saline placed in either Travatan-like or Systane bottles to simulate the corresponding prescribed medication. The videos will be graded for instillation technique and combined with scoring of survey answers.
Patients will be asked to instill the drops to their left eye with their dominant hand as we expect this to be most difficult. Patients with severe (>20/200) vision loss will instill drops into their better seeing eye.