cowtown_eric
Established Member
I used to work in ophthalmic photography taking pictures of the ocular fundus (back of eye)
I was told I had early cataracts which clouded the interior of the lens.
Night driving became a chore, so back to optometrists.
Tech used autorefractor, and tried to ship me off to the waiting m, but I said hang on.
As my complaint was about driving at night, I pointed out to her that she had all the lights on (ie pupil restricted, all light trying to focus through the cataract)
Turn off the lights, and let's get a refraction in the dark....(ie pupils dilated)
Which she did
One eye had a full diopter difference between the two autorefractions,, confirmed by optometrist, and lnight driving became ever so much easier
but you've had cataract extractions, and presumably have implants.. (which can have little complications), but I'll point out that the other important optical component of the eye is the cornea which has a shape!
daylight, pupil constricted, optics using only central area of cornea...
Nighttime, pupil dilated much wider, more cornea optics involved, and it has been disturbed by cataract extraction
There are many other nuances in the equation, but it may be worth a conversation with your ophthalmologist or optometrist
I was told I had early cataracts which clouded the interior of the lens.
Night driving became a chore, so back to optometrists.
Tech used autorefractor, and tried to ship me off to the waiting m, but I said hang on.
As my complaint was about driving at night, I pointed out to her that she had all the lights on (ie pupil restricted, all light trying to focus through the cataract)
Turn off the lights, and let's get a refraction in the dark....(ie pupils dilated)
Which she did
One eye had a full diopter difference between the two autorefractions,, confirmed by optometrist, and lnight driving became ever so much easier
but you've had cataract extractions, and presumably have implants.. (which can have little complications), but I'll point out that the other important optical component of the eye is the cornea which has a shape!
daylight, pupil constricted, optics using only central area of cornea...
Nighttime, pupil dilated much wider, more cornea optics involved, and it has been disturbed by cataract extraction
There are many other nuances in the equation, but it may be worth a conversation with your ophthalmologist or optometrist