(A) the principles of prescription of farsighted glasses 1, the principle of prescription of farsighted glasses for children with orthokeratology amblyopia preschool children within +300D ball for mild farsightedness, which is normal, generally do not need prescription glasses in high farsightedness prescription, should be based on the total farsightedness of the dilated pupil test, the highest degree of corrected vision, as the prescription degree. 2. The principle of prescription of hyperopia for children with internal strabismus The principle of prescription of hyperopia for children with internal strabismus and amblyopia is to fill the prescription with enough lenses and to consider firstly the correction of internal strabismus and secondly the correction of visual acuity. For children with hyperopia, the prescription can be overcorrected by about +100D on the basis of dilated eye examinations. 3. In principle, amblyopic children with exotropia are prescribed glasses with the lowest hyperopia and the best corrected visual acuity. For +300D ball within the mild hyperopia, can not be equipped with glasses, otherwise it is not conducive to the correction of exotropia. (B) Myopic glasses prescription principles 1, ortho-ophthalmic amblyopic children’s myopic glasses prescription principles to achieve the best vision of the lowest degree as a principle. For example, -100D ball, -150D ball, -1. 75D ball can achieve the best visual acuity, the prescription of glasses should be selected -100D ball. 2, the principle of nearsighted glasses for children with internal strabismus amblyopia Children with internal strabismus, when dispensing nearsighted glasses, should be the lowest nearsightedness that can achieve the best visual acuity. If the eye position cannot be corrected after the amblyopia is cured, corrective surgery for internal strabismus can be performed. 3, exotropia amblyopic children’s myopic glasses prescription principles exotropia amblyopic children with myopic glasses, should try to match the full number of degrees or appropriate overcorrection, which can promote the strengthening of the adjustment and convergence function, but also conducive to the recovery of eye position. It can also be combined with binocular vision training to gradually correct exotropia. If the above methods are ineffective or if the exotropia exceeds 20 degrees, it is still necessary to consider exotropia correction surgery to achieve eye position correction. (C) Astigmatism glasses prescription principle After the dilated pupil examination, if astigmatism is found, the astigmatism should be corrected regardless of the eye position of the amblyopic child. If the astigmatism is too high for the amblyopic child to accept during the trial, it is possible to reduce the astigmatism according to the situation and wear the glasses first, and then give the full astigmatism in one or several times after adaptation.