Why can you get farsighted glasses (+ prescriptions) off a rack at the dollar store but near sighted glass (- prescriptions) need an optometrist appointment

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Why can you get farsighted glasses (+ prescriptions) off a rack at the dollar store but near sighted glass (- prescriptions) need an optometrist appointment

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Far sighted glasses you get off the rack are usually reading glasses. Basically just a pair of magnifying glasses to slap on. Not wear all day.

Part of me wants to say you need them more so they are ‘worth’ more – you’re more likely to wear them all the time, you’re more likely to be design / style conscious about them too.

It’s possible too that it’s much more vital that they’re accurate for safety reasons – driving for example.

There are a few reasons for this.

First, farsightedness is much more common than nearsightedness. This means that there is more demand for farsighted glasses, so there are more options available.

Second, farsightedness is easier to correct than nearsightedness. This is because the eye is already able to focus on distant objects, so all that is needed is a lens that will help the eye to focus on closer objects.

Third, nearsightedness is more difficult to correct because the eye is not able to focus on distant objects. This means that a more powerful lens is needed in order to help the eye focus on closer objects.

Fourth, nearsightedness is more likely to cause other problems with vision, such as headaches and eyestrain. This is because the eye is constantly having to work harder to focus on closer objects.

Overall, farsightedness is much easier to correct than nearsightedness, so it is more likely that you will be able to find glasses that will help you see better without having to visit an optometrist.

They both should require an optometrist check to make sure the glasses match your eyesight.

But, the healthcare system being what is, both in terms of cost and availability, it is a better option in the long run to make the most commonly useful prescriptions cheaply available than not at all.

I’ve only ever seen correction glasses offered off-shelves in North America. In Europe and Japan you are ~~required~~ strongly advised/supposed to go see an optometrist or ophthalmologist (in some places, the distinction does not exist).

Around the age of 35, humans’ eye muscles responsible for focusing on near objects deteriorate, so even those born with/live with/got lasik to 20/20 vision will need reading glasses eventually. There doesn’t seem to be an equivalent phenomenon in eye muscles focusing on distant objects.

A new medicine in the form of eye drops has changed this, however, giving many of us over-35s an ability some of us haven’t enjoyed for decades.