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Save $400 when you buy five or more items. This promotion is a great way to save on big-ticket items, but there are a few caveats. All you need is a Gold Star Membership to take advantage of...
The $20 membership deal is available through StackSocial, a product discovery platform. The website is offering the Gold Star membership plus a $40 Digital Costco Shop Card for $60.
Prism lenses (here unusually thick) are used for pre-operative prism adaptation. Eye care professionals use prism correction as a component of some eyeglass prescriptions. A lens which includes some amount of prism correction will displace the viewed image horizontally, vertically, or a combination of both directions.
Esophoria is an eye condition involving inward deviation of the eye, usually due to extra-ocular muscle imbalance. It is a type of heterophoria. Cause. Causes include: Refractive errors; Divergence insufficiency; Convergence excess; this can be due to nerve, muscle, congenital or mechanical anomalies.
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. It is used by ophthalmologists and orthoptists in order to measure the vertical and horizontal deviation and includes both manifest and latent components. [1]
Did you know you can get an eye exam and glasses from Costco's Vision Center? Here's everything else you need to know about the Costco optical program and how it can save you money.
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