Eye protection · Overview

Visual demands


Visual demands

Dr. med. Ken Selde

FMH specialist doctor for ophthalmology and eye surgery


We place strong visual demands on our eyes – what are the consequences? The eye has adapted perfectly to our lives and needs, even working in a fourth dimension – time.

We all know that the eye is a sensory organ. Human sensory organs work naturally at all times, unless we are sleep – and even then they keep functioning. We live in an era with an intentional overload of stimuli, always somehow in pursuit of a monetary goal. We talk a lot about overstimulation, but this is not something which applies to the eyes. Evolution has made the eye what it is today: an organ which has adapted perfectly to our lives and needs. It picks up the stimuli which our brains need to process in order to enable our bodies to operate securely in a three-dimensional space. It even works in a fourth dimension of time by identifying a 24-hour pattern, using differences in brightness to regulate sleep rhythms via hormonal cycles.

 

 

A study recently published in the Journal of the American Academy of Ophthalmology demonstrated that our eyes have become more short-sighted in recent generations, as we are no longer hunters, gatherers and fishers but instead seem to have given our genes an operating distance drawn from the new visual challenges of reading with and without communication devices. This phenomenon is known as evolutionary pressure or adaptation. And so, if you find yourself in a situation with an excessive amount of visual stimulation, you can be sure that a healthy eye perceives almost infinitely everything – it is then up to the recipient, our brain, to select and decide between these perceptions.


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