Myopia Preventing With Distance-image Screen

Inclusion Criteria: * (1) Must be 6\~12 years old; * (2) Must be best corrected visual acuity \< logMAR: 0.1; * (3) Spherical Equivalence (SE) must be -1.00\~ + 6.00 Diopter (D), * (4) Spherical Equivalence (SE) must have changed \> 1.25 Diopter (D) in the recent 2 years; * (5) Must be astigmatism \<1.75 Diopter (D); * (6) Must be anisometropia \<1.75 Diopter(D). Exclusion Criteria: * (1) Strabismus disease; * (2) Amblyopia disease; * (3) Cataract disease; * (4) Glaucoma disease; * (5) Severe dry eye disease; * (6) Cannot use distance-image screen for 12 month; * (7) Other severe diseases that would effect the use of distance-image screen.