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About    OPTICIANS    EYE TESTS    GLASSES    

LONG SIGHTED

What is long sighted ?

Easier to focus at longer distance than at close up. Vision may be blurred at near. Hence term of long sighted as can see better further away.

Scientific name for long sight is Hyperopia or Hypermetropia  and person is said to be hyperopic.

Note - some people with higher amounts of long sighted may also find distance vision blurred - but near sight will be more blurred.

 

Why does long sight occurs ?

The eyeball length is too short and so rays of light would only be focused properly behind the eye. So the brain tries to refocus this image by altering the shape of the eyes internal natural lens. This is called accommodation.

This requires some effort - and more effort is needed for closer objects - hence more difficult with closer than long distance objects. May get eye strain and headaches.

If the eye cannot focus, then would have blurred image.

If the hyperopia is low , the eye may focus without any symptoms, and eye correction may not be required then.

However  symptoms of eye strain may occur especially with prolonged tasks such as reading for over 15 minutes and may even get blurry vision.

 

 

Treatment of long sight

By using a lens  to alter the path of the light, the object can be refocused to go onto the retina of long sighted eyes.

The lenses are convex shaped which bend light towards the retina (converge).

These lenses can be put into spectacles frames or used as contact lenses to correct long sight.

Power of these lenses are measured in Dioptres and are plus powers.

Eg +1.25 is mild power; +8.75 is higher power

 

Also surgical treatment is possible.

Symptoms of long sight

May vary according to amount of long sighted error. The higher amounts will also be blurred long distance as well as close up.

The sight may be clear but could go blurry vision.

Eyestrain and headaches may occur,  especially with prolonged tasks for low amounts of long sight.  

Please consult an optician or seek medical advice as blurry vision, headaches etc  may be due to other eye or health conditions.