Abstract:
:Age related changes in the dynamics of accommodation (far to near focus) and disaccommodation (near to far focus) are reported in this study. Dynamic responses to step stimulus demands from 1D to 6D, in 1D steps, were recorded with a PowerRefractor in 66 subjects in the age range 14-45 years. The accommodative and disaccommodative responses were fit with exponential functions to calculate response amplitude, time constant and peak velocity. The latency of accommodation did not change and the latency of disaccommodation increased with age. For accommodation, time constant increased and peak velocity decreased with age. For disaccommodation, no change in time constant or peak velocity was found with age. The form of the peak velocity vs response amplitude relationship (main sequence) of accommodation changed with age. The differences in the dynamics of accommodation and disaccommodation with age are discussed with reference to the age related changes in the eye leading to presbyopia.
journal_name
Vision Resjournal_title
Vision researchauthors
Kasthurirangan S,Glasser Adoi
10.1016/j.visres.2005.11.012subject
Has Abstractpub_date
2006-04-01 00:00:00pages
1507-19issue
8-9eissn
0042-6989issn
1878-5646pii
S0042-6989(05)00604-8journal_volume
46pub_type
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