The linearity of proximally induced accommodation and vergence.

摘要: This study sought to determine the linearity and amplitude of both proximally induced accommodation (PIA) vergence (PIV) by comparing open-loop responses, respectively, individual stimuli located at viewing distances ranging from 0.20 m 1,500 m. For measurement PIA, loops were opened subjects (N = 10) monocularly target through a 0.5-mm pinhole, while was assessed concurrently using an infrared optometer. In assessment PIV, loop either low-frequency difference Gaussian (DOG) grating or targets binocularly pinholes. PIV methods, vertical dissociating prisms heterophoria for various von Graefe technique. The results demonstrated significant changes in PIA closer than 3 However, proximal components attained minimum level remained constant beyond Furthermore, magnitudes linearly related distance measured diopters meter angles, respectively. These findings clearly demonstrate influence proximity on oculomotor system. Invest Ophthalmol Vis Sci 32:2985-2991,1991 Maddox 1 proposed that total response composed four independent components, namely tonic vergence, accommodative convergence due knowledge nearness (now termed vergence), fusional vergence. Recent research 2 " 5 has indicated potential