EEVblog 1554 - Optometrist AutoRefractor Keratometer TEARDOWN!

A teardown of a very interesting bit of optometry kit, a Shin Nippon NVISION K-5001 RefKeratometer (Auto Refractor Keratometer). It can measure the curvature of your cornea, and well as refractive error to diagnose near and far sightedness. Links: Manual: 00:00 - What is an AutoRefractor Keratometer? 03:41 - Don’t try this at home kids! Can Dave measure his eyeball? 06:17 - Teardown 08:14 - Pupil distance measurement 09:43 - Should have read the manual... 11:22 - How the Keratometer mire circle is generated 13:42 - Optical path and lenses 15:47 - The camera 16:53 - Fine auto-focus mechanism 18:22 - Main PCB Forum: If you find my videos useful you may consider supporting the EEVblog on Patreon: Or with crypto: BTC: 33BsprBQNBtHuVzVwDmqWkpDjYnCouwASM ETH: 0x68114e40ff4dcdd384750500501e20acf3875f8c BCH: 35n9KBPw9T7M3NGzpS3t4nUYEf9HbRmkm4 USDC: 0x68114e40ff4dcdd384750500501e20acf3875f8c LTC: MJfK57ujxy55su4XicVGQc9wcEJf6mAoXF Web Site: Other channels: EEVblog2: EEVdiscover: T-Shirts: #ElectronicsCreators