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Quan Dong Nguyen; Fixation Stability: Potential Roles of Microperimetry in the Management of Maculopathy. Invest. Ophthalmol. Vis. Sci. 201657(12):.
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© 2017 Association for Research in Vision and Ophthalmology.
Presentation Description :
Perimetry has conveyed nondoubtful contributions to the diagnosis and followup of patients. Although well established in the clinical setting, the precise evaluation of macular disorders with conventional perimetry was yet a challenge. The accuracy of the conventional visual field was based on the assumption that the gaze fixation during the examination was stable and located centrally at the fovea. The devices did not detect the eye movements and in those cases with compromised gaze fixation or lack of attention by the patient would have the stimulus presented in a more extensive area than planned for the test. The evaluation of the ability to hold steady fixation, which is a fundamental aspect of good visual function, could not be conducted by means of standard perimetry . Similarly, there were no detection of the preferred retinal locus (PRL) (nonfoveal well-defined region of retina used to fixate a target), no accurate retest examination over the same area, major limitations in patients with low visual acuity, andaccurate detection of retinal threshold over discrete retinal lesions smaller than 5° was aknown limitation. Current technology of microperimetry has addressed many of the challenges mentioned above. Among the many enhancements, PRL can now be detected. The index presentation will provide overall highlights of microperimetry and its potential roles in the management of macular diseases such as diabetic macular edema,geographic atrophy, and uveitic macular edema.
This is an abstract that was submitted for the 2016 ARVO Annual Meeting, held in Seattle, Wash., May 1-5, 2016.
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