. Accuracy self-check function

2. VD measurement function

3. It features consecutive measurement, direct point-sampling and high accuracy of orientation, with mechanical hairspring being used to level at the reflecting point of human cornea

4. Adopting line-shaped sensors of high definition advanced intellectualized electronic systems and digital display which allow the testing results more visible, legible and accurate.

5. The design of LED lamp-house and low-power consumption makes the battery life prolonged

6. The brightness of LED is adjustable

7. +2.00D compensation for the degree of eyesight is available

Specifications: