Posted 14 August 2019 - 07:21 PM
I had cataract surgery in both eyes last fall, and both were corrected to 20/20 for distance vision, and no, I have no problems seeing objects clearly thru a telescope, binoculars, camera viewfinder, etc. Since I had the type of lenses put in that are for 20/20 distance vision correction, I do have to wear those cheap kind of "reading" glasses you can buy at drug stores, Costco, etc, for reading or any up-close work, like reading computer screens, etc, so I usually do remove those glasses--if I have them on--when looking thru eyepieces of telescopes, camera viewfinders, etc, but since you can change the focus of a telescope by turning the knobs on the focuser, getting a well-focused view is no problem. Ditto for camera viewfinders as you can adjust the little diopter knob on most all DSLRs, etc.
And even if I were to wear my reading glasses at the 'scope, again since you can change the focus of the 'scope, again that would be no problem. If your eye doc has not already discussed it with you however, you should talk to him about the 3 types of corrective lenses available to be used in cataract surgery. like I said, I have the ones that are best for distance vision, but there are others that are optimized for closer up, and yet another type that are supposed to be pretty good for both closer up and distance--think they are called "adaptive" lenses or some such terminology--and while that type may sound the best way to go, my eye doc said that since they are neither optimized for close-up, nor distance vision correction, they are not as good as the types that are optimized for either close-up, or distance vision correction, so again I decided to go with the type that are optimized for distance correction as it sounded like that would work best for me and my life style, etc.
My surgeries went well, but I do have a couple small issues or "artifacts" that resulted from the surgeries. One is that all bright points of light--like stars and bright planets--and street lights, etc--have very small "spikes" of light coming off them. Fortunately however, the spikes of light are oriented somewhat differently around bright lights thru each eye, so that by looking at the lights, stars, etc., with both eyes, they just about cancel each other out, so aren't very noticeable or troublesome. And curiously, when looking at stars, etc., thru a telescope, once I focus on the object using the focuser, the spikes are no longer there! So again, that hasn't been much of a problem for me. The other thing is that I "see" bright flashes of light out of the corners of my eyes when I'm outside in the dark--or in a dark room--when I turn my head or eyes quickly from side to side. Apparently this is a fairly common side-effect of cataract surgery from others that have had the surgery that I've talked to--as are the light spikes. Some have said their light spikes went away in time, but mine are still there! So you can discuss all this with your eye doc before your surgery, but I am sure that he/she will say that there's no way that they can guarantee that none of these side-effects will not happen to you, but for me who was almost totally blind before the surgery, the surgery has been nothing short of miraculous! My last pair of regular glasses (I've been near-sighted most of my life) only lasted 5 mos before everything was a giant fuzzball again, making it dangerous to drive, etc. My eye doc said each new prescription I got for glasses after that would last a shorter and shorter time before I'd have to have them replaced with a new and stronger prescription, so that convinced me to go ahead with the surgery.
Anyhow, talk to your eye doc about all this, and good luck with your cataract surgery when you have it done!