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Current Affairs

Colour blindness

Date: 15 April 2022 Tags: Miscellaneous

Issue

The Film and Television Institute of India (FTII) has been directed by the Supreme Court to not exclude colour blind candidates from its courses on film making and editing.

 

Background

The Supreme Court had earlier concluded that colour grading module of the editing course has no relevance with the role of a film editor.

 

Details

  • The court said in its judgment that all individuals will be allowed for all courses at FTII. There will not be any limitations placed.

  • A similar case in 2017 saw the Bombay High Court denying a candidate respite to get admission to the same course for being colour blind.

 

Colour blind

Colour deficiency or colour blindness is the inability to see colours in the normal way. Individuals suffering from the condition cannot distinguish between certain colours.

 

Working of colour recognition

  • There are two types of cells that are responsible for recognizing light. The “rods” distinguish between light and dark, and the “cones” detect colour. 

  • Three different types of cones distinguish red, green, and blue, which is used by brain cells to perceive colour.

 

Occurrence of condition

  • The condition occurs when any one of these cone cells are absent or fail to work properly. The colour blindness will depend on the types of cells working.

  • In some cases, individuals may not be able to distinguish one colour from others and in some cases they cannot identify any colour.

 

Detection

The condition is detected in childhood when a child is unable to tell difference between red and green, and blue and yellow.

 

Cause

  • It is a genetic condition. The Congenital colour vision deficiencies are usually passed on genetically.

  • In cases when it manifests later in life, it is mainly caused due to trauma, or ingested toxins. In such cases, it varies from eye to eye.

  • Conditions that can cause colour blindness include glaucoma, diabetes, Alzheimer’s, Parkinson’s, alcoholism, leukaemia, and sickle-cell anaemia.

 

Vulnerable sections

  • Men are primarily affected due to colour blindness. Every tenth male is estimated to have some form of colour deficiency.

  • Men having northern European ancestry are particularly considered vulnerable to the condition.

 

Treatment

  • Colour blindness condition is permanent and remains until the individual is alive. The condition can be handled by wearing special lenses or colour filter glasses. 

  • Some new research suggests gene replacement therapy can help modify the condition.

 

Restrictions on colour blind people

  • People suffering from the condition cannot become pilot or join armed forces. It depends on severity and criteria imposed.

  • In India, individuals with mild colour blindness can obtain driver’s license but severely colour blind people cannot.