Working distance and eye and head movements during near work in myopes and non-myopes.

摘要: Purpose:? Reasons for the development and progression of myopia remain unclear. Some studies show a high prevalence in certain occupational groups. This might imply that head eye movements lead to ocular elongation, perhaps as result forces from extraocular muscles, lids or other structures. The present study aims analyse myopes non-myopes near-vision tasks. Methods:? analysed cohort 14 myopic 16 non-myopic young adults. Eye were monitored by an tracker motion sensor while subjects performed three near tasks, which included reading on screen, book writing. Horizontal measured terms angular amplitudes. Vertical range whole movement during recording. Values also assessed ratio based width printed text, changed between participants due individual working distances. Results:? significantly different among tasks (p = 0.03 p 0.014, movements, respectively, repeated measures ANOVA). vertical did not differ non-myopes. As expected, preponderated over all both meridians. A positive correlation was found mean spherical equivalent distance (r 0.41; 0.025). Conclusions:? results similar pattern participating subjects, although amplitude these varied considerably individuals. It is likely some individuals when exposed patterns.