Eye'sTest vs while you were sleeping

Thank you — more than 120,000 people have used this app. Take a 10-second vision check on your iPhone's high-resolution display every day, and keep an eye on how much screen work is straining your eyes. [Features] - The Landolt C ring rotates randomly, so you can test as many times as you like without memorizing the pattern - High-resolution displays are supported: check your visual acuity up to 2.0 - Acuity levels from 0.01 to 0.09 are checked in 0.01 steps - At 20 cm from the screen, you can measure from 0.02 to 0.4 - At 30 cm: 0.03 to 0.6 / at 40 cm: 0.02 to 0.8 / at 50 cm: 0.02 to 1.0 - At 60 cm: 0.02 to 1.2 / at 70 cm: 0.02 to 1.4 / at 80 cm: 0.02 to 1.6 - At 90 cm: 0.02 to 1.8 / at 100 cm: 0.02 to 2.0 - The rings are drawn following the international Landolt C standard formula as closely as possible - For measurements at 60 cm or more, we recommend two people: one holds the device, the other answers - Even without Premium, your last 7 records are kept on your device (never sent anywhere). Premium keeps up to 365 records with charts and CSV export - Ad-free [How to use] - Launch the app and set the distance from your eyes to the screen (10 cm to 100 cm) - Close one eye and tap the arrow button that matches the direction of the opening in the "C" [Notes] - The results of this app cannot be used as official health examination results - Stop using the app immediately if you feel unwell

언제 잠들었는지, 몇 시간 동안 잠을 잤는지 데이터 기반으로 나의 수면을 확인하고, 개선으로 이어지도록 도와주는 하루하루 나의 수면을 변화시키는 챌린지에 도전하세요