Forced duction test is to find out?: (A) Ocular muscle palsy, (B) Ocular muscle spasm, (C) Angle of detion, (D) Refractive error
Answer is A. Ans. is 'a' i.e., Ocular muscle palsy Forced duction test It is performed to differentiate between the incomitant squint due to paralysis of extraocular muscle and that due to mechanical restriction of the ocular movements. FDT is positive (resistance encountered during passive rotation) in cases of incomitant squint due to mechanical restriction and negative in cases of extraocular muscle palsy.