Definition of the nearsightedness eye
Nearsightedness or hyperopia is an optical eye abnormality in which the eye cannot see the near point or the near point looks blurred. The average normal-eyed human has a near point of 25 cm.
The cause of the nearsightedness eye
Based on the previous explanation, can be concluded that the cause of farsightedness is the cornea and the lens of the eye is less curved, so that the focal length of the cornea-eye lens system is more significant, causing the beam of light from the near point to be focused behind the retina.
Hyperopia is the same as presbyopia. Presbyopia is an eye disorder in which the ability of the eye to accommodate is reduced so that the near point away as someone ages increases. Presbyopia is caused by age, while genetic or hereditary factors cause hyperopia.
The solution of the nearsightedness eye
Nearsightedness eyes focus the beam of light behind the retina. For nearsightedness to be normal, the beam of light must be focused on the retina. The beam of light can be focused on the retina when a convex lens is placed in front of the eye. Convex lenses help converging light beams so they can focus right on the retina.