In: Psychology
Why is it so sensitive to bright light after an eye examination requiring pupillary dilation? Why are those dark plastic glasses they give you important? What would happen if you didn’t wear them? Also, why is it so hard to focus closely, which makes reading very difficult?
Examination that involves Pupillary dilation or dilation of the pupils makes the eyes sensitive to bright light because the light enters the pupil in large amount. Pupils normally dilate more in dark to make it easy for us to see. During daytime, this dilation is not much required. Since the examination causes the pupils to dilate more, more amount of light enters the eyes and it becomes difficult for the person to see in normal day light, making them more sensitive to it.
Wearing the dark plastic glasses will help reduce the amount of light that enters our dilated pupils and in turn our eyes. It also helps in getting our pupils back to its normal form in less time as compared to not using these glasses.
Not wearing the dark glasses will cause discomfort, and uneasiness. If we try to look without the glasses, it will also cause strain on the eyes. Having trouble seeing might even lead to accidents.
The drops used in the eye examination for pupil dilation can cause the constrictor muscle to paralyse. This also paralyses the focusing muscles, thereby making it difficult to focus closely and read.