(1) Determine the threshold visual acuity: (1) Cooperative: the threshold visual acuity can be found by using the low vision threshold visual acuity table below 0,10, and the visual markers can be animals, animated characters, fruits or furniture that the child likes and knows. (2) uncooperative: not to check the visual acuity, you can customize the threshold visual acuity amblyopia instrument training according to 0,05 or less. Second, the choice of low vision uncooperative children special hooded binocular monovision instrument, with the following characteristics: 1, amblyopia instrument structure (1) binocular type: can slow down the aggravation of eye tremor caused by monocular gaze. (2) hood type: can cause absolute dark environment for both eyes, so that the training eye is surrounded by black, only the icon is light, in order to actively or passively attract children to gaze and follow the icon, the dark environment can significantly slow down the eye tremor; (3) prism so that the pupil distance can be changed to 40-50 mm; (4) thickened sponge pad, so that comfortable to wear; (5) warm fragrance without odor (6) can be accompanied by children’s songs or music that young children like. 2.Operation prompting voice design: parents can be prompted to programmed operation or manual personalized operation to ensure the quality of vision enhancement. (3) Use Dr. Eye’s “eye-mask” 4-5 generation high-precision amblyopia treatment instrument The design of vision enhancement training icons and color codes in the amblyopia instrument: (1) can be personalized, i.e. personalized threshold vision enhancement training icons can be customized according to the compromise values of 0 and 05 when low vision is detected or no vision is detected; (2) the threshold icons can be words or graphics that children know or like (2) the threshold icons can be e words or graphics that children know or like, such as hands, animals, simple furniture, flowers and fruits, or animated characters, etc. The perspective of the graphic visual marker is designed with reference to the international standard visual acuity table e word visual marker perspective calculation formula; (3) there can be moving rgb color marker or raster background or flying dot color marker and other vision enhancement functions.