Session: Poster session A

Evaluation of sensitivity and specificity of slit light method in the diagnosis of cyclotorsion

purpose:

 To evaluate the amount of sensitivity and specificity of slit light method in the  diagnosis of ocular cyclotorsion.

Methods:

  120 eyes of 60 individuals (10 - 60 years old), with mean visual acuity of 0.08±0.14 Log MAR, were divided in two groups ( normal and  torsion group). Indivisuals without ocular motility disorder selected as normal  and pateints with extra ocular motility disorders and oblique muscle dysfunctions  as torsion group.

 The sensitivity and specificity of slit light (SL) in the diagnosis of ocular torsion were measured by masked investigators and compared to Fundus Photograghy(FP). Inter and intra-observer variability of theses techniques were also determined.

Results:

 The amounts of sensitivity and specificity of SL, measured by the first examiner, were 60% and 92%  for intorsion and 50% and 96% for extorsion assesment, respectively. These amounts were 53% and 95% for intorsion, and 54% and 97% for extorsion by the second examiner. The contingency coefficient between the two examiners was 68.6% for SL. This amount was 61% between FP and SL for the first examiner and 63% for the second.. The contingency coefficient for the repeatability of SL was 72.2% for the first examiner and 75.7% for the second. This amount was 71.2% between the two examiners.

Conclusion:

 SL can be consider as useful method for  diagnosis of cyclotorsion