Monofocal IOL evening TV eyes tiredness

[indoorain]

Hello again.

My mum, age 87, has monofocal IOL installed couple of years ago and she is very satisfied with the result. She needs glasses only for reading and most of the daytime she doesn't wear glasses at all. If she is watching TV in daytime she is fine without glasses, but in nighttime she needs glasses to watch TV, and only the TV, she doesn't need glasses for the rest of her surroundings in the evening. She thinks this is some sort of eye tiredness that comes to eyes after using them all day. Is there anything else maybe related to monofocal IOL apart from this tiredness that might be the cause? Many thanks.

[John C Hagan III, MD, FACS, FAAO]

Usually that is because it is night and the amount of light in the room is less than bright sunlight the pupil dilates and the eye loses some depth of focus.  Sometimes it can be helped by increasing the light near the person watching TV. Other alternatives glasses just for TV,  less expensive bigger TV

[Ron_AKA]

I agree 100% based on personal experience with IOLs. If you increase the lighting level in the room your pupils constrict down and the depth of focus is increased giving you better vision.

[John C Hagan III, MD, FACS, FAAO]

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