Serious eye diseases could bring vision loss in adults the eye disease includes glaucoma, cataract, macular degeneration, and diabetic retinopathy. Thus it is supposed to ask to get proper eye check-ups between proper intervals the timely diagnosis could save your vision.
Yes, even though you have refractive errors in either myopia or hyperopia there is a chance of getting presbyopia as you are getting aged because the refractive error is due to a change in the shape of the cornea and presbyopia is because of lack of flexibility so there is no connection between both of these conditions.
Reading glasses can improve vision in people who are having presbyopia. But still, it is advisable to consult the doctor about it sometimes you may have a refractive error and you might have mistaken it as presbyopia because in a myopic condition also there will be difficulty in seeing nearby objects.
Yes, there is a higher chance of getting vision loss when you have untreated glaucoma or cataract both of them are progressive eye diseases so they should be treated properly by an experienced ophthalmologist this will help you in restoring your vision by pausing their development.