The patient was a 17-year-old male. Because his left eye was impacted, his visual acuity gradually decreased painlessly, and he went to the Department of Ophthalmology, PLA General Hospital. Eye Examination: Best corrected visual acuity was 1.0 (-6.00 DS for the right eye
-0.25 DC ×175°) and 0.6 (+1.50 DS for the left eye
-7.50 DC x 180°); The pupils of both eyes are round and equal in size, and they respond normally to light; See Essence Picture 1 for the condition of the left eye lens. The anterior segment coherence light tomography examination is shown in Essence Picture 2. Clinical diagnosis: Left eye posterior lens cone; Refractive error in both eyes.