正常眼各屈光介质屈光力联合的结果而造成的近视,一般称之为生理性近视。这些眼的总屈光力(角膜加晶体)与眼轴的相互关系失谐,以致后焦面落于视网膜之前,每个屈光介质屈光力的值都在常态分布曲线范围之内,眼球的解剖和生理功能正常。至于各屈光介质之间相互关系的失谐是属于偶然发生,还是具有遗传性,目前还不明了。病理性近视属于病态,为一独立的疾患,具有若干特点:(1)视功能异常,如视力不能完全矫正、光敏锐度减低、暗适应不良、视野改变和 Normal eye refractive refractive power of the combined result of myopia, generally known as physiological myopia. The total refractive power of these eyes (cornea plus lens) and the axial relationship between the detuning, so that the back focal plane falls on the retina, the refractive power of each refractive index values ​​are within the normal distribution curve, the eye anatomy and physiology functioning normally. As for the detuning between the refractive media is accidental, or is hereditary, it is not clear. Pathological myopia is pathological, as an independent disease, has several characteristics: (1) visual function abnormalities, such as visual acuity can not be completely corrected, reduced acuity sharpness, poor dark adaptation, visual field changes and