we have different eye colour because of melain a liquid present across iris

Understanding Eye Color Variation
Eye color is determined by the amount and type of pigments in the iris, influenced by genetics, environmental factors, and evolutionary adaptations.
1. Genetics and Inheritance
- Eye color is primarily influenced by multiple genes, with the two main ones being OCA2 and HERC2.
- The interaction of these genes determines the amount of melanin produced, leading to variations in color.
2. Types of Pigments
- Melanin: The primary pigment responsible for eye color. Higher melanin levels result in brown eyes, while lower levels can lead to blue or green eyes.
- Rayleigh Scattering: This phenomenon explains why some eyes appear blue. Light scattering in the stroma of the iris can give a blue appearance even with low melanin.
3. Environmental Factors
- Sun Exposure: Prolonged exposure to sunlight can lead to increased melanin production, potentially darkening eye color over time.
- Health and Nutrition: Certain health conditions and nutritional factors can also influence eye pigmentation.
4. Evolutionary Aspects
- Eye color variation may have evolved as a response to geographical and environmental differences.
- For example, lighter eye colors are more prevalent in populations from northern latitudes, possibly due to lower light levels.
5. Cultural Significance
- Eye color can have cultural meanings and influences in different societies, affecting perceptions of beauty and personality traits.
In summary, eye color is a complex trait influenced by genetics, environmental factors, and evolutionary history, resulting in the beautiful diversity we see today.