Natural Abstract

Ingeborg would like natural abstracts for today's Abstract Thursday challenge, so it seemed reasonable for me to choose something of relevance to what I've done today. This afternoon I visited my optician for a sight test and prescription of some new glasses (yes even a retired eye surgeon needs someone else to measure him for specs!).

Retinal photos were taken but I didn't ask him for a copy for my blip as he took the photos, not me. So instead I've taken a photo of the front cover of one of my old textbooks, which showed a nice photo of a normal, natural retina and subjected it to some abstract fartnarkling.