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Doctor insights on: Ishihara Color Plate

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Whats ishihara color blindness test?

Whats ishihara color blindness test?

Color plates: The ishihara test plates are a series of dots of various colors with an embedded number or symbol which cannot be easily seen by the color deficient due to color confusion. They are the most commonly available test in ophthalmologists office although others are also available and some are better at separating the forms of color deficiency out. Ishihara is a good screening test. ...Read more

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When is baby`s skin color eye color hair color all determined?

When is baby`s skin color eye color hair color all determined?

At conception: When the sperm and egg combine their genetic material, the eye and skin color are determined. ...Read more

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Is there a lens to correct protanopia color defect?

Caution: The use of a red contact lens or purple tinted glasses will allow you to distinguish the letters and numbers on test plates that you get wrong with the naked eye. However they work by shifting the axis of color deficiency so you become color blind in a new way and they cut down the overall light intensity which decreases acuity and contrast sensitivity. These are not cures. ...Read more

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Different color eyes genetic?

Different color eyes genetic?

Yes: The color of the iris is a pattern defined by a number of genes and it is the combination of these that leads to the color we see in the iris. The inheritance is not simple however, and prediction of color other than the browns, is tricky and unreliable. ...Read more

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What kind of disorders or illnesses can make hair color change? Light color to dark color. Thanks!

What kind of disorders or illnesses can make hair color change? Light color to dark color. Thanks!

Your condition is: Unusual because hair color usually lightens with age, stress and illness (unless u dyed your hair). I couldn't think of an illness that can explain your condition. Take care! ...Read more

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When looking at text on screen, colours of individual letters change periodically - from black to navy blue. Not computer; overworking eyes? Diabetes?

When looking at text on screen, colours of individual letters change periodically - from black to navy blue. Not computer; overworking eyes? Diabetes?

Macular issue: The variations in the colors of the letters localizes the problem area to the central retina, the macula lutea, aka the fovea centralis. Diabetes is not impossible but not likely without a history. A retinal toxicity to the antibiotics for h. Pylori is also possible. A retina specialist or general ophthalmologist is the starting point for a dilated examination of the back of your eyes asap. ...Read more

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How does color deficiency differ from color blindness?

How does color deficiency differ from color blindness?

The same: Color blindness was the original term for conditions in which color recognition was impaired. Since "blindness" is a very charged termed, deficiency has been substituted as the politically correct term since most people with defects in color recognition are not blind at all. ...Read more

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Can black beans changes the color of stool black?

Can black beans changes the color of stool black?

Possibly : Possibly could be due to black beans. Black stools the concern is for G.I. bleeding please get evaluated properly by primary care position. Signs and symptoms of chest pain shortness of breath lightheadedness your weakness would require going to an emergency room promptly ...Read more

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Subungual melanoma: nail bed discoloration or nail plate? My nail plate has a horizontal band 1/2cm across but skin underneath is normal. Confused

Subungual melanoma: nail bed discoloration or nail plate? My nail plate has a horizontal band 1/2cm across but skin underneath is normal. Confused

See a doctor: Your nail needs to be examined by your doctor, preferably by a dermatologist. After examination you will be guided further. A close watch for change in the size of discoloration or the skin around will guide the doctor further. Keep good photographs to detect changes over time(weekly). Good luck ...Read more

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What's the difference between poor color vision and born with color blindness?

What's the difference between poor color vision and born with color blindness?

Degree: Colorblindness is not necessarily all or nothing. There are varying degrees- thats all. ...Read more

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How common is light eye color in oriental asians?

How common is light eye color in oriental asians?

Depends: Depends on what you mean by light--if you mean blue or green eyes, never, unless their parents are of different descent. If you mean light brown vs dark brown, i don't think anyone knows. I have light brown eyes but my wife's are almost black. One of my two children has light brown, the other almost black. ...Read more

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What color is full cast noble metal crown?

What color is full cast noble metal crown?

Silver & Gold: It can be yellow gold or white gold depending on the desire of the patient and/or the dentist. ...Read more

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Can eye color change?

Can eye color change?

Unusual: Eye color change in adults can signal a specific type of glaucoma. But very often, it seems that the eye color lightens, but this is due to haze in the cornea that can come with aging. ...Read more

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Do color blind people lack cones?

Do color blind people lack cones?

No: Color blind people have a set of rhodopsin light receptive pigments that are shifted in spectrum, giving a narrower range of color perception. Except for a few very rare forms, they have a normal cone count and so their acuity is normal. ...Read more

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What causes grey colored stool in children?

What causes grey colored stool in children?

Food: The stool color is determined by the germs that live in the intestine and the foods and colors eaten. Gray is ok. ...Read more