Don't know what is meant by 1.75 or 0.75, perhaps your refractive
error.

Pupils are usually dilated to allow better viewing of the retina and
other structures inside the eye.  Although it is uncomfortable, it is
important for detecting eye disease.  The pupil dilating drops also
relax accommodation and may allow for more accurate refraction.  Since
the refraction seemed to have changed follwing dilation, it was a good
thing you had it done.

You don't need to keep your eyes closed, but may want to wear
sunglasses as the dilation will make you light sensitive.  Pupils are
dilated by instilling drops, waiting for the drops to take effect and
then doing the tests that are best done with dilated pupils, so the
procedure you had done sounds right.

Showing you frames while waiting for the dilation drops to take effect
was not improper, it saves you some time.  If you don't want to get
your glasses from your optometrist or if you couldn't see well enough
to select them, you only needed to speak up and either return at
another time or go to another place to select frames.

Dr Judy

Dear Nambi,

Subject:  Pupil size.

It is not possible to determine what the numbers are that you provide.

I would suspect that they are a measure of your refractive status.
If you have a prescription -- you will find the numbers there.

The normal range of pupil size runds from 2 to 8 mm.

Best,

Otis