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Are there any ways to improvise a magnifying glass with common things you could find at any house? (Or if not, less common things that aren't too rare to find.)

For example, in case you have some kind of medicine package and you find yourself trying to read a leaflet with a really small type. In that case, just with a little magnification it would probably suffice.

46

If you have a smooth, cylindrical drinking glass made of clear glass, you could fill it with water and allow the convex shape of the glass to magnify the object behind it.

Alternately, if you have a clear plastic 2 liter bottle, you can cut off the top part that is rounded, and fill it with water and look down through the water. (Science-sparks.com)

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18

If the reason you are having trouble reading the small type is because you are farsighted/nearsighted, or because it is dark (causing your pupils to dilate and your vision to get fuzzier) you may find it useful to use a pinhole lens.

Make a pinhole in a piece of paper or some other thin object, using a pin, safety pin, or the tip of a knife, and then hold it close to your eye and look through it. The image as viewed through the pinhole will not be magnified, but it will be in focus. The smaller and more regular the pinhole is, the sharper the focus will be (and the darker the image will be, due to less light getting through).

I put a pinhole in one of my credit cards, and sometimes use it to view restaurant menus which I would be unable to read otherwise without glasses due to my farsightedness and the dim light that typically happens in restaurants.

Another thing you can use if necessary is a thumb and two opposite fingers held together to create a tiny triangular hole where they all meet.

  • I make the little triangle all the time. Works well! – subjectivist Feb 26 '15 at 23:58
  • 1
    +1 for using your fingers. I find that using your hand like a telescope works quite well too - holding the thumb/forefinger to your eye and making a small hole with your little finger. This has the benefit of blocking a lot of light coming into the eye and dilating the pupil. Also see newscientist.com/blog/lastword/2007/05/cheap-specs.html – Qwerky Feb 27 '15 at 11:30
  • I do this by folding down my index finger, making a small hole between the pad of my finger and the fold in the skin at the base of the same finger. Unfortunately the field of view is too small to do the one thing I most commonly need some help with, which is to find my %&^$ing glasses. – Steve Jessop Feb 27 '15 at 20:19
2

Here's a really good video describing several different ways to magnify sunlight to start a fire.

Don't dismiss this as not helpful though -- it gives more than one way to improvise a magnifying 'apparatus'

I'll try and describe with words, but the visual example is linked below.

Take a look, sound isn't necessary if you want to mute the video. About 3:30 long: https://www.youtube.com/watch?v=HCyHC7lnMyQ

  1. Get an old light bulb, the kind with the filament. Break into the bottom of it (the part that spins into the socket) with a screw driver or some such. Be careful to keep the glass intact. After getting the filament out, use a pinch or 2 of salt to clean out the white powder. Swish/swirl it around inside and it'll clean the powder off. Rinse, then refill and you have yourself a curved lens for magnifying.

  2. Get a small bowl/candy dish, the inside should be about the size of your fist. About 2 feet by 2 feet of clear plastic wrap, center the wrap over the bowl, then line the inside of the bowl. Fill the bowl with water about 3/4 full. Then bring the corners of the plastic wrap together, gently lift the water out of the bowl. The water will make the plastic "sag," so carefully twist the top of the plastic so it ends up like a small baggy. Keep twisting until the baggy becomes tight like a ball. Presto! You have yourself a curved lens for magnifying.

  3. Less practical, but it'd work. Take a picture frame without the glass or backing or anything, just the frame. Place it on top of two stands, as if the frame was about to become the top of a table and the stands were the legs of that table. Grab that handy plastic wrap and spread it across the frame nice and smooth. Tape the plastic securely to the frame. This would be the clear, plastic wrap, table top. Slowly pour water onto the plastic and it will sag, creating a lens. Put whatever you want to magnify under the table and look through the water to see it magnified.

  4. Using a water bottle, with water in it. Near the bottom of the bottle or the top of the bottle, you should be able to angle it just right to get a magnified image.

  5. The video uses water and a chemical reaction to create heat, which doesn't address the question at all.

    --

My own thoughts:

  1. A whiskey glass with just the right amount of water in it. Whiskey because the bottom is already in a concave shape, so the water just increases the effect (I'd imagine)

  2. A cell phone camera with zoom and a steady hand.

  3. Certain flashlights have a magnifying lens in the front to help diffuse/focus the beam of light. You could try taking that off and looking through it.

  • True, those lenses in the video are all usable to some extent to magnify! :D But listen to the comment upside ^^^^ Thanks anyways for the answer! – Alfro Mar 1 '15 at 1:08
2

Would a magnifying mirror do the job? Lots of women carry little makeup mirrors around with them.

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