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Low Vision

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Atleast 10 million people in India needs Low Vision assessments. 

We have a larger proportion of people in the older age groups and this means a higher prevalence of visual impairment.


How do we define Low Vision?

Low vision is the eye problem in which normal spectacles or surgery or any other medical treatment has not improved the vision of the patient. 

The affected person gets blurred vision for near or distance day to day activities; while reading, driving, and when writing. 
Portable electronic reading magnifiers

In other words people who are affected cannot be treated by spectacles, or surgeries or any other surgical treatment because of low vision.

Low vision may be by birth, congenital, advanced glaucoma (tunnel vision).
Normal vision Vs Tunnel Vision


We define a person having when they find it hard to see things as clearly as they would like even though they may have had an eye examination and up-to-date glasses. 
It includes people that may be severly sight impaired but it's not limited to this group of people so we can define low vision as vision that when corrected by optimal refractive correction is not adequate for the patient's needs.
Blurred Vision

Signs of Low Vision

  • Blurred vision
  • Trouble seeing to your side or tunnel vision due to advanced glaucoma.
  • Impaired night vision.
  • Difficulty reading and performing up close work.
  • A white or cloudy spot in the eye lens.
Picture Credit: ShutterStock


Steps determing low vision

Step 1 Observing the person by the way of walking or with support.
Step 2 It is also very important to take a detailed history and symptoms 
Step 3 Detailed task analysis of the person gives you an idea and ability of the person for performing essential tasks and coping up with essential correspondence.

Performing a low vision assessment

  • Vision assessment using appropriate charts  
  • Contrast sensitivity measurement
  • Refraction Establish fixating eye refract at 2m or 1m use appropriate steps
  • Visual field testing.




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