When users put their forehead to the forehead sensor, VAA-2000PSE starts the examination automatically. To see the indications (pictures, numbers, Korean Alphabet, Landolt rings and etc.) through the tester’s eyepiece, users keep eyes on the indication in the middle of background and the indications on every sides. Then move the lever to the same indication to the indication in the middle. If users cannot distinguish the indications, push on of the red buttons on the left and right sides to forgive. Then it skips the phase and change to next indication. When the exam finished, the device analyzes user’s choices and give the result data of the exam. Users can check their eyesight data by printing it from device. In addition, the device prevents user’s mistake by voice guidance
An ophthalmic chart or card printed with various symbols (e.g., letters, pictures or dots) intended to be used for testing visual acuity (e.g., Snellen chart) or testing and/or training accommodation and/or convergence or other amenable ophthalmic functions. The chart/card may be held in front of the patient or placed on a table or wall and may have specific user instructions depending on specific use. This is a reusable device.