The 6-year-old child was found to have low vision in his left eye during physical examination at school. The child once told his parents that the vision in his left eye was blurred, but it did not attract attention. There was no obvious systemic disease and medication history, and there was no obvious organic disease in the eye examination. The inspection results are as follows:

Ophthalmic examination: there are no organic lesions in the eyes

Far vision of naked eye: OD: 1.0 OS: 0.2

Naked eye near vision: OD: 1.0 OS: 0.15

Far eye position: 8 △ ESO

Near eye position: 8 △ ESO

Cycloplegia optometry:

OD：PL   1.0

OS:  +5.50DS/+1.50DCX90     0.2

Worth4 point examination: left eye suppression

Binocular stereopsis: None

Fixation nature: central fixation

The initial diagnosis was that this child belonged to typical anisometropic amblyopia