How to make my eyesight more stronger?

I've been on my apple iphone a lot even on low brightness but it seems to have ruined my vision when it comes to looking at letters and patterns far away so I have to kind of squint to see clearly I'm cutting my time off it is there anything else I can do

*How do I make my eyesight stronger?

A question seen in this Optical section often…

Things that DO NOT help fix most focus problems in the eye such as nearsightedness, farsightedness and astigmatism.
Special exercises or "methods" or "palming" or "systems"
"Natural Cures"
"Yoga" for vision
Pinhole glasses
Foods and vitamins
Sea cod liver oil
Medicine
Sunshine exposure
Pills
Herbs
Eye patches
"Looking far away"
Avoiding the use of prescribed glasses
"Not using eyes"

NOTE: if exercises worked for correcting refractive focus errors of the eye - we would all know people doing them - and fewer people would be wearing glasses

Things that protect vision over the long haul of your life
Staying fit and active may protect the retina
Wearing hat and quality sunglasses when in the sun
Well balanced diet - with lots of fruit & veggies
Regular eye exams

Proven things to correct focus errors of the eye
Prescription eyeglasses - while wearing them
Contact lenses - while wearing them
Lasik type surgery - for adults
Implanted ocular lenses

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