Click the image above to take a short test that will tell you how well your color vision is.
I scored a 16.
Via
Showing posts with label vision. Show all posts
Showing posts with label vision. Show all posts
Friday, September 23, 2011
Eyesight Color Test
Click the image above to take a short test that will tell you how well your color vision is.
I scored a 16.
Via
Thursday, December 9, 2010
Sunday, September 5, 2010
Optical Illusions Extravaganza
~ A Feature post over at Dark Roasted Blend ~
Don't hurt your brain looking at these. Better yet, warp your brain into another dimension. Above: A classic example of topologically unique sculptures is the Moebius Strip. Emmanuel Lattes made probably the best presentation of this in recent memory: 3D Printed Double Moebius Strip. (More info here.)
It's easy to get dizzy just looking on these object, trying to process how they could possibly be constructed and where the mysterious "hidden joint, or break" is located. Today we are going to look at various illusion in shape, color, shadow and 3D perspective:
French magician Francis Tabary created many such strange objects, some placed in an outdoor garden environment - all of them head-scratching and eye-catching examples of 3D optical illusions:
How about an impossible door?
This little animation is fast becoming very popular - and no wonder: when you first look at the spinning girl, her rotation is probably clockwise. But if you start to concentrate on her shadow instead, suddenly her rotation switches to counter-clockwise! It may take some time, but the moment it happens, you are going to be genuinely surprised... (First seen here.)
Continue on to the full article - there's a TON more!
Don't hurt your brain looking at these. Better yet, warp your brain into another dimension. Above: A classic example of topologically unique sculptures is the Moebius Strip. Emmanuel Lattes made probably the best presentation of this in recent memory: 3D Printed Double Moebius Strip. (More info here.)
It's easy to get dizzy just looking on these object, trying to process how they could possibly be constructed and where the mysterious "hidden joint, or break" is located. Today we are going to look at various illusion in shape, color, shadow and 3D perspective:
French magician Francis Tabary created many such strange objects, some placed in an outdoor garden environment - all of them head-scratching and eye-catching examples of 3D optical illusions:
How about an impossible door?
This little animation is fast becoming very popular - and no wonder: when you first look at the spinning girl, her rotation is probably clockwise. But if you start to concentrate on her shadow instead, suddenly her rotation switches to counter-clockwise! It may take some time, but the moment it happens, you are going to be genuinely surprised... (First seen here.)
Continue on to the full article - there's a TON more!
Thursday, June 10, 2010
Eye Floaters
(I thought it was just me..)
Today I found out what causes “eye floaters”.
For those who’ve never experienced this phenomenon, eye floaters are little oddly shaped objects that appear in your vision, often when one looks at bright light such as a blue sky. Their shapes vary greatly, but will often appear as spots, cobwebs, or randomly shaped stringy objects. These are not optical illusions, but rather something your eyes are actually perceiving. There are a few different things that can cause this, but in most cases these eye floaters are caused by pieces of the gel-like vitreous breaking off from the back portion of your eye and then floating about in your eye ball.
The vitreous humor, or often just “vitreous”, is a clear gel that fills the gap between your retina and lens, helping maintain the round shape of your eye in the process. This gel is about 99% water and 1% other elements; the latter of which consists mostly of a network of hyaluronic acid and collagen. Hyaluronic acid ends up retaining water molecules. Over time though, this network breaks down which results in the hyaluronic acid releasing its trapped water molecules. When this happens, it forms a watery core in your vitreous body.
As you age then, pieces of the still gel-like collagen/hyaluronic acid network will break off and float around in this watery center. When light passes through this area, it creates a shadow on your retina. This shadow is actually what you are seeing when you see the eye floaters.
Continue reading..
Via
Today I found out what causes “eye floaters”.
For those who’ve never experienced this phenomenon, eye floaters are little oddly shaped objects that appear in your vision, often when one looks at bright light such as a blue sky. Their shapes vary greatly, but will often appear as spots, cobwebs, or randomly shaped stringy objects. These are not optical illusions, but rather something your eyes are actually perceiving. There are a few different things that can cause this, but in most cases these eye floaters are caused by pieces of the gel-like vitreous breaking off from the back portion of your eye and then floating about in your eye ball.
The vitreous humor, or often just “vitreous”, is a clear gel that fills the gap between your retina and lens, helping maintain the round shape of your eye in the process. This gel is about 99% water and 1% other elements; the latter of which consists mostly of a network of hyaluronic acid and collagen. Hyaluronic acid ends up retaining water molecules. Over time though, this network breaks down which results in the hyaluronic acid releasing its trapped water molecules. When this happens, it forms a watery core in your vitreous body.
As you age then, pieces of the still gel-like collagen/hyaluronic acid network will break off and float around in this watery center. When light passes through this area, it creates a shadow on your retina. This shadow is actually what you are seeing when you see the eye floaters.
Continue reading..
Via
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