Supported by Tianjin Major Science and Technology Projects(No.17ZXHLSY00070);Tianjin Clinical Key Discipline Project(No.TJLCZDXKQ012)。
AIM:To evaluate the effectiveness of Grand Seiko Ref/Keratometer WAM-5500 compared to Topcon KR800 autorefractor in detecting refractive error in large scale vision screening for Chinese school age children with the W...