Fig 3. Mean optical intensity of retinal layers in different age groups.

Groups 1 to 6 represent the age groups (shown in Table 1). Mean optical intensity of different retinal layers are shown in corresponding legends. Mean optical intensity was highest in RPE layer, followed by photoreceptor layer, RNFL, IPL, GCL, OPL, INL and ONL. Optical intensity was stable prior to 50 years of age, and then decreased in most retinal layers (RNFL to photoreceptor layer).