Visual Acuity Screening for early detection on Students Using Twin Cards Optotype

Myopia is seen as a benign condition which is a public health problem and must be given attention, concerning visual problems, quality of life, and economic consequences. Nearly half of the world's blindness has been caused by uncorrected refraction, with myopia occupying a high percentage of the group, meaning myopia is the beginning of blindness. Uncorrected disturbances of visual acuity should be screened This study aims to develop a method of screening for myopia in school children, resulting in twin card optotypes. The study was carried out by diagnostic tests to analyze the sensitivity and specificity of twin card optotypes in screening for visual impairment in schoolchildren using primary data from the visual test. The results of this study are twin card optotypes which can easily be used in almost any condition, without requiring access to electricity, not causing variables bullies in a row of questions on the same letter size. Faster time because it does not cause repeated questions one paper one object. Installation does not require encoding on the wall, avoid memorization and avoid factors from concerns about clinical validity and application accuracy. Conclusion Sensitivity of sharp vision screening method Optotip twin card when compared with snoten optotip vision sharpening method which is 83.33% while specificity is 71.43 %.