Effect of Weak Hyperopia on Stereoscopic Vision

Convergence, accommodation and pupil diameter were measured simultaneously while subjects were watching 3D images. The subjects were middle-aged and had weak hyperopia. WAM-5500 and EMR-9 were combined to make an original apparatus for the measurements. It was confirmed that accommodation and pupil diameter changed synchronously with convergence. These findings suggest that with naked vision the pupil is constricted and the depth of field deepened, acting like a compensation system for weak accommodation power. This suggests that people in middle age can view 3D images more easily if positive (convex lens) correction is made.

[1]  Mark Mon-Williams,et al.  Natural problems for stereoscopic depth perception in virtual environments , 1995, Vision Research.

[2]  K. Kroemer.  Fitting the task to the human , 1997 .

[3]  J B Sheehy,et al.  Depth perception after prolonged usage of night vision goggles. , 1989, Aviation, space, and environmental medicine.

[4]  Hiroki Takada,et al.  An Attempt at Preventing Asthenopia Among VDT Workers , 2003, International journal of occupational safety and ergonomics : JOSE.

[5]  P. Howarth.  Oculomotor changes within virtual environments. , 1999, Applied ergonomics.

[6]  W. Charman,et al.  Age Changes in the Interactions between the Accommodation and Vergence Systems , 2001, Optometry and vision science : official publication of the American Academy of Optometry.

[7]  M. Mon-Williams,et al.  Binocular vision in a virtual world: visual deficits following the wearing of a head‐mounted display , 1993, Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians.

[8]  T. Freeman,et al.  Motion perception during sinusoidal smooth pursuit eye movements: signal latencies and non-linearities. , 2008, Journal of vision.

[9]  Hong Hua.  Correct focus cues in stereoscopic displays improve 3D depth perception , 2010 .

[10]  R A Weale,et al.  Senile changes in visual acuity. , 1975, Transactions of the ophthalmological societies of the United Kingdom.

[11]  S Saito,et al.  Visual accommodation and subject performance during a stereographic object task using liquid crystal shutters. , 1996, Ergonomics.

[12]  David M. Hoffman,et al.  Vergence-accommodation conflicts hinder visual performance and cause visual fatigue. , 2008, Journal of vision.

[13]  Etienne Grandjean.  Fitting the task to the man , 1969 .

[14]  K Noro,et al.  Surmised state of accommodation to stereoscopic three-dimensional images with binocular disparity. , 1996, Ergonomics.

[15]  C. Schor,et al.  Fixation of disparity: a steady state error of disparity-induced vergence. , 1980, American journal of optometry and physiological optics.

[16]  Karl H.E. Kroemer,et al.  Fitting The Task To The Human, Fifth Edition: A Textbook Of Occupational Ergonomics , 1997 .

[17]  B Gilmartin,et al.  Factors influencing accommodative adaptation. , 1992, Optometry and vision science : official publication of the American Academy of Optometry.