to evaluate the application of college of optometrist in vision development ( covd ) quality of life ( qol ) questionnaire in vision screening for normal school children and children with learning disabilities ( ld ) and to determine appropriate referral - score for different target population . a total of 90 children ( normal : 45 , ld : 45 ) who attended government primary schools aged between 6 to 12 years old were recruited . an interview session with normal children and parents or teachers in children with ld was made to determine visual symptoms using shorter version of covd - qol questionnaire . the evaluation was made base on the sensitivity and specificity for detection of refractive error , amblyopia , strabismus , vergence and accommodative disorders . the mean score for normal children and children with ld were 22.4710.75 and 12.248.72 respectively . rapidity of the test in normal children and children with ld were 177.279.52 seconds and 162.1616.58 seconds respectively . in normal children referral score of = 20 showed highest sensitivity ( 66.7% ) and specificity ( 95.8% ) for detection of amblyopia . sensitivity and specificity for referral - score of = 20 , = 10 and = 4 for detection of overall vision problems in children with ld were ( 20.4% , 100.0% ) , ( 54.5% , 100.0% ) and ( 81.8% , 100.0% ) respectively . covd - qol questionnaire was recommended as an easy , rapid and cost - effective tool for school vision screening .
purpose : to evaluate the application of college of optometrist in vision development ( covd ) quality of life ( qol ) questionnaire in vision screening for normal school children and children with learning disabilities ( ld ) and to determine appropriate referral - score for different target population.methods:a total of 90 children ( normal : 45 , ld : 45 ) who attended government primary schools aged between 6 to 12 years old were recruited . 
 an interview session with normal children and parents or teachers in children with ld was made to determine visual symptoms using shorter version of covd - qol questionnaire . 
 a comprehensive eye examination was performed after completion of the questionnaire . 
 the evaluation was made base on the sensitivity and specificity for detection of refractive error , amblyopia , strabismus , vergence and accommodative disorders.results:the mean score for normal children and children with ld were 22.4710.75 and 12.248.72 respectively . 
 rapidity of the test in normal children and children with ld were 177.279.52 seconds and 162.1616.58 seconds respectively . 
 in normal children referral score of = 20 showed highest sensitivity ( 66.7% ) and specificity ( 95.8% ) for detection of amblyopia . 
 sensitivity and specificity for referral - score of = 20 , = 10 and = 4 for detection of overall vision problems in children with ld were ( 20.4% , 100.0% ) , ( 54.5% , 100.0% ) and ( 81.8% , 100.0% ) respectively.conclusion:covd-qol questionnaire was recommended as an easy , rapid and cost - effective tool for school vision screening . 
 different referral - score was suggested for different target population .