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Techniques Of Accomodation Test

 

Accommodation

  • Accomodation is the ability of the eye to bring to focus clearly an object lying between eye and a distance of one meter. 

  • A child has accommodation up to 7 cm; there is a gradual decrease in the power of accommodation with age, which becomes very marked after 30 years of age. 

  • Accommodation should be measured independently in each eye. 

  • The Ivory card of the binocular gauge and the scale are used.  The scale is kept at the infra-orbital margin and one eye is closed or covered. 

  • The card is kept at about 20 cm from the candidate on the scale.  He is instructed to read letter “ALT” on the card, to keep looking at the letters and inform the examiner when the letters start blurring. 

  • The card is then gradually brought towards the eye and the point where the letters start blurring is noted.  I

  • t is denoted as “Accommodation Right Eye 14 cm, Lt Eye 14 cm”. 

  • To confirm the above, the card is then moved from the nearest position to the eye to the far end with instruction to the candidate to inform the examiner when he can read letter “ALT”.

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