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  • 4sold (TM) Dioptric pinhole with metal hinges GridGlasses Pinhole glasses for eyesight strengthening Pinhole Glasses for Eyesight Strengthening - Unisex Black - unisex black
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4sold (TM) Dioptric pinhole with metal hinges GridGlasses Pinhole glasses for eyesight strengthening Pinhole Glasses for Eyesight Strengthening - Unisex Black - unisex black

by 4sold

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2 new from £1.15
  • pinhole brand 4sold
  • orginal only from 4sold® with 4sold logo
  • Activates your natural vision ability
  • Quick delivery
  • the perfect gift for dad, mom, grandparents

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Product details

  • Boxed-product Weight: 9 g
  • Delivery Destinations: Visit the Delivery Destinations Help page to see where this item can be delivered.
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  • Item model number: b-1
  • ASIN: B00CBFX7WK
  • Date first available at Amazon.co.uk: 21 Nov. 2013
  • Average Customer Review: 4.2 out of 5 stars  See all reviews (44 customer reviews)
  • Amazon Bestsellers Rank: 18,813 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
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Product Description

Pinhole glasses, also known as stenopeic glasses, are eyeglasses with a series of pinhole-sized perforations filling an opaque sheet of plastic in place of each lens. Similar to the workings of a pinhole camera, each perforation allows only a very narrow beam of light to enter the eye which reduces the size of the circle of confusion on the retina and increases depth of field. In eyes with refractive error, the result is claimed to be a clearer image. However, a second effect may appear at the common bridge between each two adjacent holes, whereby two different rays of light coming from the same object (but each passing through a different hole) are diffracted back toward the eye and onto different places on the retina. This leads to double vision (objects having doubled edges) around the rim of each hole the eye is not focussing on, which can make the overall image disturbing and tiring to look at for prolonged periods of time. Unlike conventional prescription glasses, pinhole glasses produce an image without the pincushion effect around the edges (which makes straight lines appear curved). While pinhole glasses are claimed to be useful for people who are both near- and far-sighted, they are not recommended for people with over 6 diopters of myopia. Additionally, pinhole glasses reduce brightness and peripheral vision, and thus should not be used for driving or when operating machinery

Customer Questions & Answers

Customer Reviews

4.2 out of 5 stars

Most Helpful Customer Reviews

2 of 2 people found the following review helpful By pabaines on 28 Aug. 2014
Verified Purchase
I found these glasses by accident. There doesn't seem to be anyting in the way of scientific studies to verify their effectiveness, but I like the thinking behind them. Instead of straining to see small print, or using lenses that will make your eyes lazy, rather use these which allow your eyes to relax while letting you read the smallest of print.

They do take some getting used to because the pinholes mean you have a series of "windows" through which you look. I find myself moving my head from side to side as I locate the best angle for reading. However, once I have done this it is just a case of following the text. Where it gets difficult is when you have to make big eye movements, such as when reading pieces of text spread out on your desk. I wouldn't wear these for driving of when operating potentially dangerous equipment. By contrast, when watching television, they are quite comfortable with a small amount of distortion, but you soon get used to it.

The quallity is not brilliant but they seem sturdy enough. I carry them in my backpack and they get a fair bit of rough treatment.

Style-wise, they remind me of the glasses worn in The Matrix. From a distance they do look like sunglasses.
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3 of 3 people found the following review helpful By Chris on 14 July 2014
Verified Purchase
I purchased these for my wife as she has early stage cataracts and found images on the television were bluring.
She says they take a bit of getting used to but now wears them whenever the television is on.
When I bought them I thought that, at that price, they may not be particularly good quality but have proved to be perfectly acceptable.
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3 of 3 people found the following review helpful By frederick wieland on 6 Oct. 2014
Again I would recommend this product. I wear glasses and every year or so I have to upgrade my prescription.
I have just been reading a book with pinhole glasses that would normally be a blur without my normal glasses. I just read 3 chapters without my prescribed glasses...thank you
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3 of 3 people found the following review helpful By James Perrins on 22 Jun. 2014
They came very quickly, cheap and cheerful. I would recommend these to people who are short sighted like myself. Wear them for 10-15 minutes a day and you will feel your eyes getting better. Although not medically proven yet you can feel the difference from the first time you wear them.
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3 of 3 people found the following review helpful By ian potter on 25 Jun. 2014
Verified Purchase
delivered very promptly
great value for money
the glasses are absolutely amazing considering there is no glass
i would recommend these to anyone needing glasses/ contacts, can't wait to throw my glasses away
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3 of 3 people found the following review helpful By A.. Baz on 18 April 2014
Verified Purchase
hey work, it is amazing how impessing is the difference before and after. I think it is a very good eye exercise. I bought extra pinhole glasses to give them as a gift to my friends and they loved them.
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2 of 2 people found the following review helpful By D. Reynolds on 14 July 2013
Verified Purchase
...Seeing difference within a week of wearing. I know it's working, initially feels like I'm wearing my Nan's glasses. My Dad with diabetes couldn't see through them.
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2 of 2 people found the following review helpful By Daniel Campo on 16 Jun. 2014
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Item arrived at time. A very good exercises glasses for your eyes. I wear it every morning, you have to get used to wear it. Recommended
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