Actually you don’t necessarily have to go to an eye clinic or hospital for this matter, you can go to any optical stores who has an Optometrist that provide retinal imaging services if you wish for a more comprehensive examination

some of these places also have a slit lamp to check for cataracts and also a eye pressure machine to check for glaucoma etc. can call in to places to ask!
If your Zeiss digital lenses are starting to become blurry recently for near, it’s likely that you may need just to increase the reading power too.