Thank you for that additional information and the two pictures. They are excellent and I can clearly see the white areas located at about 3:00 in your right eye and about 6:00 in your left.
This is from loss of pigment in your iris.
The most likely cause, and one that an optometrist would be expected to miss, is a condition called pigment dispersion syndrome.
While this is nothing to freak out over you really need to see an ophthalmologist in the near future for a good slit lamp exam looking for a telltale sign called a kruckenberg spindle on your corneal endothelium as well as a painless, in office test called gonioscopy looking for other signs of this condition.
In most cases there is no other problems however pigment dispersion syndrome can, in time, lead to pigmentary glaucoma.......which left untreated can cause severe vision damage/loss over time.
In many patients a simple laser treatment (laser peripheral iridotomy) can prevent or greatly delay the development of pigmentary glaucoma.
I am sorry that your optometrist did not think to refer you to a Eye MD......and I'm very glad you contacted JustAnswer.
Here is a very good article from a highly respected source that you might find interesting:
Does this make sense to you?
It's safe for you to press the positive feedback button now if you so desire. And, never fear, even after you press that button I'll still be right here to continue helping you, but, as I do work for tips, I want to make sure you are happy before rating me.
Dr. Rick MD FACS