Thereareseveralcausesleadingtopooreyesightlikeillness,a...
问题详情：Thereareseveralcausesleadingtopooreyesightlikeillness,aging(老化)andpoorreading 61 (habit).Televisions,computersandreadingarealsothecausesofhavingpooreyesight.Ifyouhappentoworkinfrontofthe...