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Colour blindness is not a type of blindness at all; it is an insufficiency in the way some people see colour. Once afflicted by this vision problem, people face difficulty in distinguishing specific colours like red, green, blue or yellow. So to call it colour vision deficiency would be much appropriate, and it hits men more often than women. In a report by Prevent Blindness America, it is revealed that about 8% of males and less than 1% of females are affected with colour vision problems. Generally, red and green colour deficiency is the most commonly found. In very rare instances, a person may carry a trait which lessens his ability to distinguish between blue and yellow colours. This blue-yellow hue insufficiency normally is found in men and women equally.
Understanding signs and symptoms: Do you have any difficulty in seeing yellow, green or red colours? Do people often tell you that you are seeing the wrong colour? If so, then these are key signs that you are affected with a colour perception deficiency. Quite opposite to popular belief, hardly a colour blind person is able to see only the shades of gray. Most people who are deemed as colour blind are able to see shades but cannot distinguish between one colour and another and get easily confused with other shades, depending on the kind of colour blindness they are affected with. If you have suddenly developed a colour vision deficiency when you were able to view and distinguish all the shades previously, then you should visit an ophthalmologist without further delay.
Causes behind colour blindness: Colour blindness takes place when the light-sensitive cells within the retina stop responding accurately to variations in wavelengths of light.
Photoreceptors present in the retina are termed as rods and cones. Rods are present abundantly, and about 100 million rod cells are present in human retina and these cells are very sensitive to light, but rods are impervious to sunlight and therefore, are incapable of perceiving colours. The cones, on the other hand, are responsible for our understanding of different colours. There are three types of cones, each of which is responsible for perceiving red, green and blue light. The three cones work together to help us see the whole range of colours. People who are colour blind usually have faults in a particular cone cell, which makes them unable to distinguish that particular shade.
Combatting colour blindness: Gene therapies are reported to cure colour blindness in monkeys, as per the reports of a study conducted by researchers of the University of Washington and Florida in September 2009. While early methods appear promising, gene therapy is not considered effective for human beings unless the treatments are verified to be safe.
Hence there is no effective means of curing colour blindness, but there are some strategies that may aid you to function better. However, if you are into graphic designing or anything that requires handling of different colours, then you will need professional help. The sooner you become aware of your insufficiency, the better you can compensate for it.
Some people also use contact lenses or eyeglasses that act as filters to enhance colour perception. If you are affected by this problem, make sure you visit an eye-care practitioner for detailed advice.
Cataract has just started in my left eye it's diagnosed by the Dr, and I see a dark dot always present what ever I see and it moves in the direction of my eye movements. How to avoid this dot and how prevent cataract.
Hello Sir, I am 27 years old. Weight 56 kg. Height 5.5. My eye sight is weak. I can't see from too much far. From Last one month, I am working with computer desktop about 6 hours daily. I feel some pain in my eyes. And some swelling near palak. I am using rose water at night on daily basis. Bt pain is not stopping. Actually pain is little, not too much. I am not using any optical till now. Please suggest me.
I am a diabetic and have split vision in the left eye and cataract in the right eye. Will eye exercises like rotating the eyeballs, be beneficial to eyes.
In today’s world, most of the work that you do is on your computer. With an increasingly digitized world, computers can’t be replaced. Though they have made your work easier, they do come with certain disadvantages as well. The rays emitted by a computer screen can be harmful to your eyes if exposed for an extended duration.
It is important that you take certain precautionary measures to protect your eyes:
1. Wash your eyes: Wash your eyes on a regular basis; it facilitates cooling and relaxation of the eyes. Make it a routine to wash your eyes at least 5 to 6 times in a day.
2. Get computer glasses: Use computer glasses to protect your eyes as they help to minimize the effect of the radiation from the screen. If you work for long hours in front of the computer, then you should consider getting a pair of computer glasses.
3. The position of your screen: The screen should ideally be positioned at an arm’s length and the viewing angle of the monitor should be around 35 degrees. Make sure you position your chair accordingly keeping these tips in mind.
4. Eye exercise: You should exercise your eyes to reduce the strain and relax your eyes. Follow the 20-20 rule wherein after working on your computer for 20 minutes, you redirect your gaze to an object that is around 20 feet away. This helps your eye muscles to relax and thus, improves your eye health.
5. Don’t work at a stretch: Take breaks in between your work sessions to reduce fatigue in your eyes. Constantly staring at a screen for an extended amount of time can cause problems in your eye. Take 2 minute breaks for every 30 minutes you spend working on your computer. This helps to reduce the strain on your eyes also helps to release tension in the muscles of the neck and back.
6. Blink more than usual: Blinking moistens your eyes and causes tear production which does not allow the eye to suffer from dryness. It also prevents eye irritation and helps in clearing out dirt from the eyes.
A red eye is one of the first and most common symptoms of conjunctivitis. Conjunctivitis is the inflammation of the tissue that lies over the white part of the eye and lines the inner side of the eyelid. It is usually the result of a viral infection and can easily spread from one person to another. Conjunctivitis can also be a symptom of STDs like gonorrhea or Chlamydia. In newborns, conjunctivitis can be vision threatening while in grownups it is not considered a serious health risk.
The symptoms of conjunctivitis differ according to the cause of the infection. Some common symptoms of conjunctivitis are:
* Green or white discharge from the eye
* Redness of the white part of the eye
* Inflammation of the eye lid
* Waking up to crusted yellow discharge
* Itchiness and burning in the eyes
* Increased sensitivity to light
* Blurred vision
An eye examination and testing a sample of the fluid secreted by the eye can be used to diagnose conjunctivitis. It can easily be treated at home and does not require hospitalization. Antibiotics are often given in the form of eye drops and ointments to treat conjunctivitis. These usually need to be applied 3-4 times a day for a period of 5-6 days. Wash your eyes before putting the eye drops. Once applied, close your eyes and roll the eyeball around to distribute the medicine and keep it from overflowing out of the eye. Wash your hands immediately after applying the eye drops.
Viral conjunctivitis is highly contagious. If you are suffering from it, you should take a few days off work and restrict your social interactions. Wash your hands frequently as you may unconsciously rub your eyes. This is especially important with regards to meals and finger foods. Also, avoid sharing towels, pillow cases etc to minimize the transmission of the disease from one person to another.
Avoid using makeup while being treated for conjunctivitis. With conjunctivitis, the eye is more sensitive to irritants and thus a speck of makeup can worsen the situation. Also avoid contacts. If you wear contacts regularly, dispose the current set and start using a fresh set after your doctor gives you a clean chit.
Artificial tears or non prescription eye drops can also be used to relieve the itchiness and burning in the infected eye. If only one eye had been affected by conjunctivitis, do not use the same eye drop bottle for both eyes.