Colour blindness, also known as colour vision deficiency, is a condition that affects the way a person perceives colours. While it doesn’t result in complete blindness, it does cause difficulties in distinguishing between certain colours.
How the eye perceives Colour
The human eye detects colour through specialized cells in the retina called photoreceptors. There are two main types of photoreceptors:
Rods: These are responsible for vision in low light conditions and do not detect colour.
Cones: These are responsible for colour vision and function best in bright light. There are three types of cones, each sensitive to different wavelengths of light, corresponding to the primary colours of vision: S-cones (Shortwavelength): Sensitive to blue light. M-cones (Medium-wavelength): Sensitive to green light. L-cones (Long-wavelength): Sensitive to red light.
When light enters the eye, it stimulates these cones in various combinations, sending signals to the brain that are interpreted as different colours. For example, if red and green cones are both stimulated, the brain perceives yellow.
Causes of Colour blindness
Colour blindness is primarily a genetic condition passed down through families. It occurs due to abnormalities in the photoreceptors in the retina, known as cones, which are responsible for detecting colour. There are three types of cones, each sensitive to different wavelengths of light: red, green, and blue. When one or more of these cones don’t function properly, it leads to colour blindness.
Most cases of colour blindness are inherited and linked to the X chromosome. Since men have only one X chromosome, they are more likely to be colour blind if they inherit the defective gene. Women, who have two X chromosomes, are less likely to be colour blind, as they would need to inherit the defective gene from both parents.
هذه القصة مأخوذة من طبعة September 2024 من Health Vision.
ابدأ النسخة التجريبية المجانية من Magzter GOLD لمدة 7 أيام للوصول إلى آلاف القصص المتميزة المنسقة وأكثر من 9,000 مجلة وصحيفة.
بالفعل مشترك ? تسجيل الدخول
هذه القصة مأخوذة من طبعة September 2024 من Health Vision.
ابدأ النسخة التجريبية المجانية من Magzter GOLD لمدة 7 أيام للوصول إلى آلاف القصص المتميزة المنسقة وأكثر من 9,000 مجلة وصحيفة.
بالفعل مشترك? تسجيل الدخول
The Rise of Clean Beauty and Its Impact on Consumer Choices
In recent years, the beauty industry has experienced a significant transformation with the emergence of \"clean beauty.\"
How to Manage High Blood Pressure for Optimal Eye Health
High blood pressure can have a significant impact on eye health, but with proper management, you can protect your vision and overall health. A combination of a heart-healthy diet, regular exercise, stress management, and regular eye check-ups can help keep your blood pressure in check and preserve your eyesight.
Ayushman Bharat: How India's Largest Health Insurance Scheme Is Transforming Rural Healthcare
India has one of the largest populations in the world, and ensuring access to quality healthcare for all citizens is a tremendous challenge.
ARADHANA ORTHOPEDIC HOSPITAL Introduces Shivamogga's First Fully-Automated Robotic Joint Replacement System
Shivamogga: Aradhana Orthopedic Hospital in Shivamogga has taken a significant step towards revolutionizing healthcare in the region by introducing the first fully automatic robotic system for knee replacement surgeries.
Breast Cancer Experts Recommend Annual Mammograms for Women Over 30
The rising incidence of breast cancer is becoming a global health crisis, affecting women at increasingly younger ages.
Should You Start Your Day with Fruit?
Starting your day with fruit can be a fantastic choice for a variety of reasons.
Essential Oils A Beginner's Guide to Aromatherapy and Natural Healing
Inrecent years, essential oils have gained popularity as a natural approach to wellness. Used in aromatherapy, these concentrated plant extracts can enhance physical and emotional well-being.
Nuclear Medicine in Thyroid Health Diagnosis and Treatment
Nuclear medicine has transformed the diagnosis and treatment of thyroid disorders, providing a range of non-invasive, precise, and effective options for patients with thyroid issues.
Nutritional and Health Benefits of Plant Protein Alternatives
Since time immemorial, consumption of good quality food has been considered essential for human nutrition. Animal meat and dairy products are important foods for humans. These contain all the nutrients required by the body.
Fungal Infections
How to Recognize and Treat Fungal Infections Early