DEDICATED AT THE LOTUS FEET OF MOTHER SAI

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BIOLOGY SEMINAR.

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QUESTIONNAIRE. NAME OF THE STUDENT : P. Virajitha NAME OF THE PATIENT : -- RELATION WITH STUDENT : Source from internet NAME OF THE DISEASE : Colour-blindness DURATION OF ILLNESS : Long term SYMPTOMS : Decreased ability of seeing colours PROGNOSIS : Good Prognosis TREATMENT : No treatment till date (Special glasses and contact lenses can help) REMARKS AND VERDICT : Colour-blind people can consult doctor about technology and take help of it to perform their tasks.

Colour-blindness is a colour-vision deficiency where one cannot distinguish between certain colours. The human eye has three cones : sensitive to blue light sensitive to green light sensitive to red light Defects in these cones causes colour-blindness.

WHAT CAUSES IT?. Colour-blindness is usually genetic. To understand why, we have to look at the genetic structure of a male and female. There are two chromosome namely X and Y. A male carries the chromosomes X and Y (XY) whereas female carries the chromosomes X and X (XX). The gene responsible for this condition is carried on the X chromosome. Colour-blindness is common in males and rare in females..

This is because if a male has to be colour-blind the gene responsible for this has to appear only the one X chromosome whereas if a female has to be colour-blind, the gene has to appear on both X (XX) chromosomes. A colour-blind son must have a colour-blind mother whereas a colour-blind daughter must have a colour-blind father and a carrier mother. Even if a father is colour-blind, the son won’t be so required the mother isn’t because the father can only pass on Y chromosome to his son..

TYPES OF COLOUR-BLINDNESS. People suffering from colour-blindness can experience three types of it. The three major types of colour blindness are: Red-green colour-blindness (Four sub-types) Deuteranomaly Protanomaly Protanopia Deuteranopia Blue-yellow colour-blindness (Two sub-types) Tritanomaly Tritanopia Total Colour-blindness.

RED-GREEN COLOUR-BLINDNESS. Red-green colour-blindness is most common type. People suffering from this type cannot differentiate between red and green. The grass always looks red to person with red-green colour-blindness..

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BLUE-YELLOW COLOUR-BLINDNESS. Blue-yellow colour-blindness is less common. People cannot differentiate between blue and green, and between yellow and red. There are two sub-types. The first sub-type is Tritanomaly. This condition makes it hard to tell the difference between blue and green, and, yellow and red. The second sub-type is Tritanopia. It makes a person unable to differentiate between blue and green, purple and red, and, yellow and pink. It also makes colours look less bright..

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PROGNOSIS AND TREATMENT. A picture containing person indoor suit Description automatically generated.

TEST FOR COLOUR-BLINDNESS. Graphical user interface Description automatically generated.

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JAI SAI RAM. A HUMBLE PRESENTATION BY: P.VIRAJITHA, VIII C.