Methodology
Participants will be required to sit in for two separate sessions of recording within a two-week interval. To avoid the effects of diurnal variations, the second session will be arranged at a similar time of day as the first session. Retinal densitometry will be conducted for only one eye on both sessions. A demonstration video of the procedure will be shown to participants before one drop of two different mydriatics, 1.0% Tropicamide and 2.5% Phenylephrine, is instilled into the test eye. An eye patch is placed over the test eye before adjustments are made to the seat and table height. The room light is turned off for dark adaptation to occur. After 30 minutes, participants will uncover the patched eye before retinal densitometry procedure is performed on the test eye.
Participants medical history, baseline measurements are taken only on the first session only. Measurements obtained include visual acuity (VA), Van Herick angle estimation (VH), intraocular pressure (IOP) measurements before the retinal densitometry procedure. Due to the use of mydriatic drops, Van Herick angles and history are checked to ensure participants safety from inducing acute angle closure glaucoma. Participants with previous history of an adverse reaction to mydriatic drops, history of photosensitive epilepsy, ocular conditions such as age-related macular degeneration, cataracts and poor general health, VA of less than 0.2 Logmar in better eye, narrow angles(VH
