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may include refractive myopia (the cornea and lens-bending properties are too strong) and axial myopia (the eyeball is too long)
About 3 hours.
Around 4 hours
If you where your reading glasses too long you acually can get a headache.
Myopia is when you can't see far objects. People with Myopia have abnormally long eyes - with a greater distance between the cornea and the retina, this results in light from distant objects falling short of the retina. The result is a blurred image Other words for Myopia is shortsightedness and nearsightedness
14 hours
Just over 3 hours
I keep reading 72 hours.
A little over 10 hours of music at the same time as reading.
Myopia, also called nearsightedness or shortsightedness, is a refractive defect of the eye in which collimated light produces image focus in front of the retina when accommodation is relaxed. Those with myopia see nearby objects clearly but distant objects appear blurred. With myopia, the eyeball is too long, or the cornea is too steep, so images are focused in the vitreous inside the eye rather than on the retina at the back of the eye. The opposite defect of myopia is hyperopia or "farsightedness" or "long-sightedness" - this is where the cornea is too flat or the eye is too short.
The shortest time is 12 hours and 10 minutes.
3 to 3 and 1/2 hours