Utility of TriIRIS C9000® in Diagnosis and Treatment for Patients With Asthenopia

Purpose: To report on the utility of TriIRIS(R) C9000 in diagnosis and treatment for three patients with severe asthenopia. Methods and Results: We measured convergence and pupillary reaction with TriIRIS(R) C9000 in order to examine accommodative function of the following three patients with severe asthenopia. Case 1; A 44-years-old man using a personal computer for a long time with mono focal glasses for far vision complained of ocular tiredness and visual loss during close work. As the waveforms of TriIRIS(R) C9000 showed the insufficiency of miosis in accommodation, we suspected accommodative asthenopia. After he used the slightly lower corrected glasses that we prescribed for the patient, his asthenopia improved. Case 2; A 36-years-old woman with esotropia complained of ocular tiredness. The waveforms of TriIRIS(R) C9000 showed that only left eye had been utilized to see. Her asthenopia improved by using our prescribed glasses with Fresnel prisms. Case 3; A 37-years-old man wearing soft contact lenses with near vision disturbances complained of headache and nausea for a few years. His contact lenses appeared overcorrected, and the waveforms of TriIRIS C9000 showed accommodative asthenopia. We prescribed lower corrected soft contact lenses, and then his asthenopia improved. Conclusions: The TriIRIS(R) C9000 which showed the usefulness for making diagnosis and treatment for asthenopia may be a valuable device for the disease.