What kind of performance does presbyopic have

The main manifestation of presbyopic is blurred vision when looking at near objects, and may be accompanied by eye fatigue, soreness, dryness, and even headache.

This is due to the aging, the gradual hardening of the lens, thickening, and eye muscle adjustment ability also decreases, resulting in reduced zoom ability, so when looking at near objects, because the image projection in the retina can not be fully focused, see near objects will become blurred. presbyopic symptoms belong to physiological phenomena, not pathological state is not a refractive error, is people into the middle and old age after the inevitable visual problems.