Abstract：
:Properties of presumed mechanisms controlling photoreceptor alignments are partially defined. A phototropic mechanism normally dominates alignment, but do modest changes in orientations occur with dark patching? Here, new photopic Stiles-Crawford (SCE-I) determinations were made before patching (pre-patch), just after 8-days of dark-patching (post-patch), and 3 days after patch removal (recovery test). We tested at 0, 11 and 22 degrees in the temporal retina of both eyes. Ten eyes of adult subjects were tested. SCE-I peak positions and Stile's parameter 'rho' were assessed. Dark-patching effects were small. Observations revealed meaningful corrective alignment overshoots with recovery in the light. Results suggest (1) the presence of multiple weak mechanisms affecting receptor alignments in the dark; (2) the phototropic mechanism to be dominant in the light; (3) the need for multiple test loci to be sampled in such studies, and (4) small changes in the SCE-I in the pupil plane can reflect meaningful events occurring at the retina.
journal_name
Vision Resjournal_title
Vision researchauthors
Kono M,Enoch JM,Strada E,Shih P,Srinivasan R,Lakshminarayanan V,Susilasate W,Graham Adoi
10.1016/s0042-6989(00)00228-5subject
Has Abstractpub_date
2001-01-01 00:00:00pages
103-18issue
1eissn
0042-6989issn
1878-5646pii
S0042-6989(00)00228-5journal_volume
41pub_type
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