February 27, 2003
Sine Amsler Charts: a new method for the follow-up of metamorphopsia
Optholinx
Sine Amsler Charts (SAC) are a set of eight modified Amsler charts where replaced the straight lines by sine curves of the same frequency but with different amplitudes (grades IVIII). The patient first examines a regular Amsler chart with the affected eye; subsequently the SAC are presented in random order to the fellow eye. With this eye the patient then selects the SAC with the amplitude that best corresponds to the metamorphopsia observed with the affected eye. After 30 min the test was repeated. A comparison of pre- and postoperative SAC scores was made in 63 patients. The correlations between preoperative visual acuity, membrane type, leakage on fluorescein angiography, preoperative SAC score, postoperative SAC score and postoperative visual acuity were analyzed. The SAC examination is a reproducible and rapid method for the comparison of the preoperative and postoperative metamorphopsia in patients undergoing pucker surgery and it may serve as an additional outcome measure.
Posted by mehdi khanlari at February 27, 2003 10:49 PM