Standardized ETDRS portable test, all 5 Test Charts, Nearly perfect Correlation with Classic ETDRS Lane Charts (see ref. 4). Take from Room to Room, Office to Office. Eliminates the Dedicated Lane. Optional Charts available for Potential Vision Testing. Voltmeter for Bright Adjustment and Charge Status, Rechargeable Battery. Validated at Wills Eye Hospital, See Reference #4.ETDRS Hand-HeldQuantityAdd to CartOne year warranty
