$60
A chart that is read from a fixed distance; used as measure visual acuity. they are just one part of a complete eye exam.Vision tests check many different functions of the eye.
Features:
Vision Testing Software—–Compatible with Win XP, Win 7, Win 8 system.
The products can be installed on the personal computer with the LCD screen 14”,17”,19”, it is combined with a installation CD,a USB dog,and a romote control, afterwe install the software on the computer,and plug into the USB watchdog and the remote control receiver, then we can operate the softwareeasily by the remote control and change the charts conveniently.
Specifications:
1.Charts includes:E Snellen, C Landolt, ABC letters, Numbers, Children, Astigmatism, Achromatopsia, Synthesis, Ophthalmic pictures;
2.Distance adjustable:6.3m, 5m, 4m, 3m, 2.5m, 2m, 1.5m, 1.2m, 1m
3.Dimension:21.7(L)x17.7(w)x4.2(H)cm
4.Weight:0.5kg
The product includes the following parts:
Installation CD X1
Remote ControlX1
USB Watchdog X1
Standard Ruler X1
Users ManualX