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28:18
YouTube
Huygens Optics
Optical Interferometry Part 2: Measuring Optics with a Zygo GPI LC
This is the second video on optical interferometry, which is dedicated to measuring the wavefront shapes of a mirror, 2 lens assemblies and 3 microscope objectives. Contents: 00:00 Intro 02:04 Video camera upgrade 04:23 DFT-fringe software 06:57 Transmission Sphere reference calibration 12:29 Shape of a Zerodur Perkin Elmer wafer stepper mirror ...
65.1K views
Oct 2, 2023
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#Eye Examination Procedure
✨ Thinking about SMILE/LASIK? 💡 Start with a comprehensive eye exam and experience a smooth, painless procedure at DND International Eye Hospital. Especially, we are offering limited-time special benefits: ✅ FREE eye examination. ✅ Discounts up to 30% OFF for DND's services. ✅ Instant discount of up to 1,000,000 VND for SMILE/LASIK surgery. 👍 Clear vision is closer than you think. | DND International Eye Hospital
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1 month ago
Dr.parthasarathy memorial eye hospital on Instagram: "When Is “No Surgery” the Best Treatment? 👁️ Not every eye condition needs another procedure — sometimes, the safest decision is to not operate. In this real patient consultation, Dr. Kiruthikadevi T. explains a complex case involving a patient who had undergone cataract surgery with silicone oil placement in the past. The patient reported blurry vision and seeing “dots” in the affected eye. 🔍 What the examination revealed: Residual silicone
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