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COLOUR BLINDNESS
Author admin@dlei Categories Colour blindness Leave a comment

COLOUR BLINDNESS OR COLOUR VISION DEFECIENCY

Colour vision deficiency is the decreased ability to see the colour or differences in the colours.

The most common cause of colour blindness is an inherited fault in the development of one or more of three sets of colour sensing cones in the eye . Males are more likely to be colour blind than females. Incidence  in male is 1 in 12 men and in female 1 in 200 females as the genes responsible for the most common forms of colour blindness are on “X” chromosome  .

Diagnosis is done with the ISHIHARA COLOUR CHART TEST .

AQUIRED CAUSES OF COLOUR BLINDNESS —-

  1. Chronic illness -Alzheimer’s disease , Diabetes Mellitus. , Glaucoma , Leukaemia , liver disease, Chronic alcoholism , Macular degeneration , Multiple sclerosis , Parkinson’s disease, Sickle cell anaemia , Retinitis pigmentosa
  2. Drugs causing colour blindness – Barbiturates, antituberculosis drugs , antihypertensive drugs .

No cure for hereditary or genetic colour blindness. If you become aware of a colour deficiency early enough in life you may be a

COLOUR BLINDNESSble to compensate by training for one of the many careers to see in a full range of colour.

Special lenses are available to enhance the colour perception.

How can you detect colour blindness by yourself?

  • Colour blind person sees green colour as brown colour.
  • Regular eye check-up at doctor clinic is recommended so that it can be detected.

Ishchiara chart

COLOUR BLINDNESS

dada-laser-eyes
Author admin@dlei Categories Healthy eyes Leave a comment

HEALTHY HABITS FOR HEALTHY EYES

HEALTHY HABITS FOR HEALTHY EYES

Food is the best medicine for any problem, and also it prevents us from many diseases. A healthy diet leads to healthy body. Same apply your precious eyes. There are certain habits which helps to keep your eyes healthy and young for longer period and effect of ageing can be prolonged.

  1. EAT WELL- Good eye health start with proper diet which include the healthy food, fruits and veggies
  • Green leafy vegetables like spinach, kale and collards.
  • Oily fish have oil in their tissues and in the belly cavity around the gut like salmon, mackerel trout and tuna.
  • Eggs,Beans, Nuts, Oatmeal and other non-meat proteins sources.
  • Oranges, other citrus fruits, juices.
  • Oysters and Pork.

A well-balanced diet also keeps you away from obesity and related diseases like Type II Diabetes Mellitus which is the leading cause of blindness in adults.

  1. QUIT SMOKING-

It makes you more likely to develop cataract, damage to the optic nerve (which sends signals to brain) and macular degeneration which affects retina.So restrict your smoking habits for healthy eyes and diseases free body

3. USE SAFETY EYEWEAR-

If you use hazardous or air-borne materials on the job, or at home, wear safety goggles. Sports like cricket and ice hockey lead to eye injuries, hence wear eye protection like helmets, protective face masks, sports goggles.

   4. WEAR SUNGLASSES-

The pair of shades will help protect your eyes from harmful ultraviolet rays. Too much UV exposure increases chances of cataract and macular degeneration. Wrap around lenses help to protect eyes from the sides as well. Polarised lenses reduce glare while driving. Wearing sunglasses over contact lenses is also recommended.

  1. COMPUTER VISION SYNDROME-

Long hours on the computer can cause eyestrain, blurring of vision, dry eyes, focussing problems, headache, neck and back pain.

 

To Avoid your eyes from getting tired while working on PC, Laptops:-

  • Make sure your glasses/ contact lens prescription is up to date.
  • Computer screen level should be slightly below eye level.
  • Choose a comfortable supporting chair and sit so that your feet are flat on the floor.
  • Increase blink frequency.
  • Avoid glare from windows and light. Use antiglare screen for your computer if needed.
  • Rule of 20- 20-20 means after every 20 minutes of computer use, look 20 feet away for 20 seconds.
  • Leave your chair at least after every two hours and take a 15 minute break.
  • DRINK A LOT OF WATER
  1. VISIT YOUR EYE DOCTOR REGULARLY–

Everyone, including children need at least a one yearly routine eye examination to detect and treat any eye issues at an early stage.

It helps to protect your sight and lets you see better!!

sunglass-in-uv rays
Author admin@dlei Categories UV rays Leave a comment

Ultra violet (UV) rays

How does Ultra violet (UV) rays affect my vision??

Sunlight is major source of UV rays.

There are 2 types of UV rays namely UV-A and UV-B. Over time UV rays may cause number of eye problems.

UV-A
can hurt your central vision. It can damage the macula, a part of the retina at the back of your eye.

UV-B
The front part of your eye (the cornea and the lens) absorbs most UV-B rays, but these rays may cause even more damage to your eyes than UV-A rays

 

Macular Degeneration

UV rays may lead to macular degeneration, a leading cause of vision loss.

Cataract

UV rays, especially UV-B rays, may also cause some kinds of cataracts. A cataract is a clouding of the eye’s natural lens, the part of the eye that focuses the light we see.

Pterygium

Another UV-related problem is a growth called pterygium. This growth begins on the white of the eye and may involve the cornea. Eventually, the growth may block vision. It is more common in people who work outside in the sun and wind.

Skin Cancer

Skin cancer around the eyelids is also linked to prolonged UV exposure.

Corneal Sunburn

Corneal sunburn, called photokeratitis, is the result of high short-term exposure to UV-B rays. Long hours at the beach or skiing without proper eye protection can cause this problem. It can be very painful and may cause temporary vision loss.

 

How to protect your eyes from UV rays

 

  • Always use goggles whenever you are in sunlight.
  • Use of transition lenses of good quality helps a lot to reflect back UV rays from your spectacles/ glasses.
  • There are certain light sources even at home which emit UV rays, replace them with the non-harmful ones.
  • Use of polarised sunglasses also helps to protect against UV rays