Blepharitis is an eye infection that usually involves the eye lid margins and may be associated with conjunctivitis. It can begin in early childhood and continue throughout your life as a chronic condition or may even develop at a later stage.
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The crystalline lens of the eye is clear and transparent. The lens focuses the light into the retina to create a sharp image, which helps people see objects clearly. In certain circumstances, the lens develops cloudiness or opacity. This obstructs light from being transmitted into the retina, causing blurring of vision. This condition is known as a cataract. Usually, cataracts do not cause any problems at an early stage as the cloudiness affects only a small part of the lens. But, as the cataract grows, they affect more parts of the lens, making it difficult for a patient to see objects. Both eyes usually get affected, but cataracts do not spread from one eye to another. A cataract might progress quicker in one eye than the other.
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Colour blindness is a condition where a person cannot figure out the difference between certain colours. This happens because he/she may be born without certain colour sensitive pigments in their eyes. These pigments are usually present in the cones of the eye, which are present at the back of the eyeball. The eye has a number of components, and one of the most important parts of the eye is the retina. The retina is placed at the back of the eyeball and is packed with nerve endings that carry impulses to the brain along with two types of photoreceptor cells, called the rods and cones. The rods are mainly responsible for perceiving the presence of light and are placed on the outer edge of the retina. The central part is filled with cones. Cones have a number of pigments that help them perform their main function of helping us see colours. These pigments have a different wavelength which, when activated, helps us perceive colour. The three main colours that these pigments are sensitive to are– green, blue and red. In the case of colour-blind people, because of the deficiency of certain pigments, they are unable to see these colours. For example, what we may see as red, they may see as light green or grey, depending on the type of colour blindness they are suffering from. The prevalence of colour blindness is more in boys compared to girls. It has been reported that 8% of men are colour blind in this world, while only 0.5% of women suffer from this disorder. Girls are mainly the carriers of this disorder and pass it to their offsprings. A girl child will be affected with colour blindness only if her father is colour blind and her mother is a carrier.
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Do you experience dry, burning eyes? Headaches that just will not go away? Are you sick of staring at the computer screen? Well you could be suffering from what the doctors call computer vision syndrome (CVS). CVS is a temporary condition caused using a computer or staring at a screen for a long time period. In this day and age where most people work on computers for long hours, it is a condition that ails most of the urban workforce. We talked to Dr Prakash Nayak, an expert ophthalmologist about the issue. Computer vision syndrome (CVS) is a condition that affects your eye and vision and is everpresent in today’s urban population who spend all days on their laptops or computers. Your eyes have to work a lot harder when you view the computer screen. Working on computers have exceptional characteristics and is visually demanding that make individuals susceptible to various vision-related conditions. CVS presents visual symptoms, which may be temporary and disappear with resting your eyes; however, if you do not seek treatment, these symptoms may worsen with time.[1]
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Conjunctivitis, also known as pink eye, is a condition in which the eye becomes red and swollen. It occurs when the conjunctiva, a part of the eye, becomes inflamed due to allergies or infection. Conjunctiva is the transparent, thin tissue that covers the outer surface of the white part of the eye (sclera) and the inner surface of the eyelids. It helps to keep the eyelid and eyeball moist. Conjunctivitis can affect one or both the eyes. It is a common condition among young children and can occur in adolescents and adults too. The condition can spread from one person to another easily depending on the type of conjunctivitis. Although conjunctivitis heals on its own, it is recommended that you consult a doctor for conjunctivitis as some types of conjunctivitis require treatment.
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Glaucoma is a disease that is the result of a number of mechanisms that produce increased pressure within the eye. This elevated eye pressure causes damage to the optic nerve over time. Unfortunately, the damage caused by glaucoma to the optic nerve is irreversible. There are no symptoms associated with most forms of glaucoma, which is why it is also referred to as the ‘silent thief of vision’. The eye is a vital organ in our body. Like a camera, the eye captures information about shape, colour and movement, and relays it to the brain. The brain then processes this information to enable us to ‘see’ the world.
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