LCD- 236 Screen Projector 
1) Includes polarizing test, can do double eyes balance test
2) Red & Green deepness adjustment 
3) Contrast test
4) Color blind: ISHIHARA test
5) Mirror test
6) Rand-oct: number randomize
7) Many kinds of language are available
8) Screen brightness adjustment
9) Screen brightness adjustment
10) Auto shut off time adjustment
11) Update the software by SD card which behind the monitor
12) It can link with RIGHTWAY Auto Phoropter
13) Four units can be operated without problem