The visible spectrum of light consists of colors with varying wavelengths. Red light has the longest wavelength, followed by orange, yellow, green, blue, indigo, and violet.

The cornea is the transparent outermost layer of the eye. Its primary function is to refract and focus incoming light onto the retina, enabling clear vision.

Deuteranopia is a type of color blindness where individuals have difficulty distinguishing between red and green colors. It is the most common form of color blindness, affecting approximately 1 in 20 males.

Iodopsin is a pigment found in the cone cells of the retina. It is responsible for detecting short-wavelength light, primarily in the blue region of the visible spectrum.

Color constancy is the ability of the human visual system to perceive colors consistently despite changes in lighting conditions. Our brain automatically adjusts color perception to maintain the perceived color of objects under different light sources.

Secondary colors are created by mixing two primary colors. Orange is a secondary color obtained by mixing red and yellow.

Humans have three types of cones in the retina, each sensitive to different wavelengths of light. The presence of these three types of cones allows us to perceive a wide range of colors.

The retina is a thin layer of tissue at the back of the eye. It contains specialized cells called photoreceptors, which convert light into electrical signals that are then transmitted to the brain via the optic nerve.

Achromatopsia, also known as complete color blindness, is a rare condition where individuals lack the ability to perceive any color. They see the world in shades of gray.

Tertiary colors are created by mixing a primary color with a secondary color. Purple is a tertiary color obtained by mixing red and blue.

Color fusion occurs when two or more colors are perceived as a single color when viewed from a distance. This is due to the limited resolution of the human eye, which cannot distinguish between fine details at a distance.

Light adaptation is the process by which the eye adjusts to brighter lighting conditions. It involves changes in the pupil size, retinal sensitivity, and the activity of photoreceptors to optimize vision in brighter environments.

Complementary colors are pairs of colors that, when mixed together, produce a neutral color like gray or white. Red is the complementary color to green.

Tritanopia is a type of color blindness where individuals have difficulty distinguishing between blue and yellow colors. It is a relatively rare form of color blindness.

The visible spectrum of light consists of colors with varying wavelengths. Violet light has the shortest wavelength, followed by blue, green, yellow, orange, and red.