It probably depends on the type of camera you shoot with. I have both myopia and presbyopia so wear glasses with progressive lenses all of the time. If I took them off I wouldn't be able to see if there was anything worth shooting. Contact lenses are of course not an option. However, I never have problems getting the eye close enough to look through a viewfinder with glasses on, although I have to use the dioptre adjustment because the distance part of the glasses lens is against the viewfinder. They are also transitional lenses so darken with increasing light intensity. This is usually not a problem with my Canon 70D because the light through the viewfinder is bright enough, but I do have trouble seeing the image or data on the rear screen in bright sunlight, sand or snow (the last rarely a problem where I live). I also have trouble with the EVF on my Nikon P900 under extreme conditions. The worse case was on top of Mt Etna where the strong UV and reflected light from the snow sent the glasses so dark I couldn't see anything through the EVF and thought the camera had stopped working. If it became a persistent problem, the option would to carry a pair of non-transitional lenses for photography, and use the transitional lenses at other times.

I started using Geosetter after Google stopped its support of Picasa, which was very good at geotagging. Just a matter of dragging the photo onto the position on the map pane. However, within weeks of Google stopping support, the map pane stopped working due to some change in the Maps API.

I have used Geosetter for several years. It also links to Google maps, but sometimes it also has some trouble linking to these. The map image can be dimmed out and have a watermark across it saying it is For Development Use Only. Geosetter has a bit of a learning curve.

Recently I found a solution on the web and managed to get Picasa's map pane working again by running regedit and going to:
HKey_Current_User\Software\Microsoft\Internet Explorer\Main\FeatureControl\Feature_Browser_Emulation
Then add a DWORD named "picasa3.exe" and set to 2af8.

I don't how long this will work, and it doesn't help if you don't have Picasa, although there are places on the internet where you can probably find it.

The Olympus TG5 is a great value camera, and I got some satisfying photos while snorkelling at Galapagos and on the Great Barrier Reef. At snorkelling depths, light and colour are not a problem. The only problem with using the in-built flash where light is poor is that if there are particles floating in the water, those close to the camera lens may be brightly illuminated and will detract from what you are trying to photograph. That happened to me a couple of times in shaded situations when I had forgotten to disable the automatic flash.