Is a myopia correction of 1.2 overcorrection?

Generally speaking, correcting vision to 1.2 is considered overcorrection. Detailed explanation is as follows:

Overcorrection refers to providing a higher lens prescription than actually needed during glasses fitting, which causes the focal point to fall behind the retina and may lead to various discomfort symptoms. During vision correction, 1.0 is considered the appropriate corrected visual acuity. Wearing glasses with this prescription allows clear vision for both distant and near objects without causing discomfort. Once the prescription exceeds 1.0, it is considered overcorrection, which may cause certain damage to the eyes and also lead to symptoms such as double vision and dizziness.

In addition, long-term overcorrection may keep the eyes in a constant state of strain, leading to increased intraocular pressure, expansion of the eyeball wall, elongation of the eye axis, and thereby accelerating the progression of myopia, which is detrimental to vision recovery.

In daily life, excessive vision correction may impose unnecessary strain on the eyes and even affect visual development. Therefore, it is recommended to undergo a comprehensive eye examination before getting glasses, so that the doctor can understand the patient's eye condition and provide glasses that are comfortable and accurate for the eyes.