And I guess we’ll start the Ditropan again; he had “issues” this week without it.
Or should we wait until he gets his glasses, since the Ditropan affects his vision? Or should I make sure he’s taking Ditropan and get his eyes tested again, otherwise his glasses will have the wrong prescription? Or does SqueegeeJr get two sets of glasses, one for Ditropan-eyes, and one for non-Ditropan? This is confusing.
squeegee- Did the ophthalmologist dilate his eyes before prescribing the glasses? If so, it would be ok to fill that glasses prescription and to resume the Ditropan. If he wasn’t dilated, there is still a chance he’ll have blurred vision on Ditropan.
Why? Or, more specifically, what does dilating the eyes have to do with it?
Ditropan (oxybutynin) is one of a class of drugs (anticholinergics) which can cause blurred vision by its action on the smooth muscle fibers of the ciliary body in the eye. This leads to a reduced ability to accommodate (or focus) the lens of the eye. If one is farsighted, or hyperopic, this will blur the vision, especially at near. When you go to the doctor and get your eyes dilated, the drops have the same effect. (That is why your reading vision is so blurred after you get dilated.) Children have a remarkable ability to accommodate, and often the hyperopia is underestimated unless the prescription is checked with dilating drops. This gives a more accurate reading of the refractive error.
My SO says my son’s eyes were dilated, so I guess we’re OK. Thanks for the additional info!
So, using a camera anology, when the camera lens iris is small, you get greater depth of field, and when its wide open you get a very shallow DOF. So you get a similar effect when the eyes are dilated? The depth of field is very shallow, so its more difficult to focus precisely?
In truth, it makes no difference what size the pupils are. It all has to do with the effect on the lens of the eye, and its ability to change is shape, and thus its focal distance.
OK, I guess the camera analogy wasn’t a very good one. In a camera, the lens(es) don’t change shape, unlike an eye. Thanks, iDoctor.
Last word: my Son got his glasses last Friday. He was actually enthused to wear them, and reports his vision has really improved when trying to see things up close.
His glasses were a bit heavier than I expected, heavier than my glasses, but then I have astigmatism and presbyopia, not hyperopia, plus his glasses were about $200, mine were closer to $400 which I’d guess means lighter frames. His lenses were more coke-bottley than I was expecting, much thicker (like 3x) than my walk-around glasses, and even noticeably thicker than my reading glasses.
In any case, he seems happy, he hasn’t had a headache or blurred vision yet, so provisionally we’ll call it a win. Thanks to all who contributed, much appreciated.