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2. Prism correction - Wikipedia

   en.wikipedia.org/wiki/Prism_correction

   Prism dioptres. Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]

3. Prism cover test - Wikipedia

   en.wikipedia.org/wiki/Prism_Cover_Test

   The prism cover test ( PCT) is an objective measurement and the gold standard in measuring strabismus, i.e. ocular misalignment, or a deviation of the eye. [1] It is used by ophthalmologists and orthoptists in order to measure the vertical and horizontal deviation and includes both manifest and latent components. [1]

4. Shop the 10 Best Microcurrent Devices for an Instant Face Lift

   www.aol.com/shop-10-best-microcurrent-devices...

   TheraFace Pro. "The price is steep ($399 for the device itself, cleansing brush, microcurrent attachment, LED rings, percussive tips, stand, charger, and case; $99 for the additional hot and cold ...

5. Aberrations of the eye - Wikipedia

   en.wikipedia.org/wiki/Aberrations_of_the_eye

   Aberrations of the eye. The eye, like any other optical system, suffers from a number of specific optical aberrations. The optical quality of the eye is limited by optical aberrations, diffraction and scatter. [1] Correction of spherocylindrical refractive errors has been possible for nearly two centuries following Airy's development of methods ...

6. I Swear, These Microcurrent Devices Are Like An Instant Face-Lift

   www.aol.com/lift-derm-approved-microcurrent...

   If you don't want to take a trip to the med spa, opt for an at-home microcurrent device, which dermatologists, celebs, and even Women's Health editors recommend. “Microcurrent devices use low ...

7. The best at-home microcurrent devices to lift and firm skin

   www.aol.com/news/best-home-microcurrent-devices...

   Foreo Bear Facial Toning Device $ at Amazon. Foreo Bear Facial Toning Device $ at Nordstorm. Foreo Bear Facial Toning Device $ at Ulta. What sets Foreo Bear apart is that it can deliver results in ...

8. List of instruments used in ophthalmology - Wikipedia

   en.wikipedia.org/wiki/List_of_instruments_used...

   Spectacles (glasses) to correct refractive errors of the eye; not invasive. Contact lenses. to correct refractive errors of the eye; a little invasive. Phoropter. used in refraction testing. Tonometers. used to determine the intraoccular pressure (IOP) - useful in glaucoma; video link for various types of tonometers.

9. I Tried the Viral Device That’s Supposed to Lift and Sculpt ...

   www.aol.com/tried-viral-device-thats-supposed...

   Meet the expert: Yael Halaas, MD, is a double board-certified plastic surgeon in New York, NY. Dr. Halaas specializes in facial cosmetic and reconstructive plastic surgery and non-surgical ...