VILLCASE 3pcs Optical Flipper, ±0.25° ±0. 5° ±1.0° Adjustable Flips Trial Lens Optical Equipment Optometry Tool for Near Amblyopia Test Phthalmic Tools

Great way to self-assess how much weaker (or stronger) should single vision lenses be for use at different distances (e.g. from reading to watching TV).

I'm impressed with these. I was expecting cheaper flimsy pastic frames, but actually they have turned out to be quite robust. I like the fact you can alter the pd and the lenses seem very clear. They have worked well enough to confirm what I had suspected in that I'm around 0.5D more short sighted than my last prescription. I've not been convinced about my contant lens prescription and now I'm sure it's needing changed. Would recommend these for keeping a check if your vision alters a lot.

There are fantastic quality for the price!! I actually prefer them to the metal version you can buy

Can be better

As an Optometrist I am very pleased with this product. The lenses can be adjusted depending on the Px’s PD which is great. I have found it extremely useful for all types of Px’s including children. The product is lightweight and doesn’t take up too much space in my work bag. I’d highly recommend this to anyone working in the optical/medical field.