Does a white screen drain battery?

On LCD/IPS screens, a white screen consumes standard power. However, on OLED/AMOLED displays , displaying pure white uses maximum power because every pixel is fully lit. If you need to save battery on an OLED device, use our Black Screen Tool instead.

How do I fix a stuck pixel?

A stuck pixel (red, green, or blue dot) can sometimes be fixed by rapidly flashing colors. Try our Color Game or use a specialized pixel fixer tool that cycles colors at high speed to "unstick" the liquid crystal.

VISION SCREENING

Color Blindness Test

Take a quick Ishihara-style test to check your color vision. Identify the hidden numbers in each plate.

How It Works

1. View Plates

Analyze each Ishihara plate.

2. Pick Number

Select the number you see.

3. Get Results

Receive your vision score.

Medical Disclaimer This is a screening tool, not a medical diagnosis. Consult an eye care professional for accurate results.

SIMULATOR

Color Vision Simulator

Upload an image to see how different types of color blindness affect vision

Original

Click to upload image

Simulated (Normal)

Understanding Color Blindness

What is Color Blindness?

Color blindness (or color vision deficiency) is a reduced ability to distinguish between certain colors. It affects approximately 8% of men and 0.5% of women worldwide. Most color blind individuals can see colors, but have difficulty distinguishing between specific shades.

The Ishihara Test

Developed by Dr. Shinobu Ishihara in 1917, this test uses plates containing colored dots that form numbers or patterns. People with normal color vision see certain numbers, while those with color deficiencies see different numbers or nothing at all.

Types of Color Vision Deficiency

Protanopia Red-Blind

Difficulty distinguishing between red and green colors. Red appears more green/brown.

Deuteranopia Green-Blind

The most common type. Difficulty with green wavelengths. Reds and greens may look similar.

Tritanopia Blue-Blind

Rare. Difficulty distinguishing blue and yellow. Blues may appear greenish.

Frequently Asked Questions

Can color blindness be cured?

Currently, there is no cure for inherited color blindness. However, special glasses and contact lenses (like EnChroma) can help some people with red-green color blindness see colors more vibrantly. Gene therapy research is also showing promising results.

Is this test accurate?

This online test provides a general screening but is not a replacement for professional eye examination. Monitor calibration, screen brightness, and ambient lighting can affect results. For accurate diagnosis, please consult an optometrist or ophthalmologist.

Can women be color blind?

Yes, but it's much rarer. Color blindness is typically inherited through the X chromosome. Since women have two X chromosomes, they need to inherit the gene from both parents. Men only need one affected X chromosome, making them much more likely to be color blind.