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Pattern thresholds for moving and stationary gratings during smooth eye movement
| Content Provider | Semantic Scholar |
|---|---|
| Author | Murphy, B. J. |
| Copyright Year | 1978 |
| Abstract | The influence of smooth pursuit eye movements on the visibility of stationary and moving objects was investigated by measuring eye movements and contrast thresholds for seeing bright and dark bars of a 7 cycle (5.14c/deg) sine grating in three different viewing conditions: (1) Subjects maintained fixation, without saccades, on a stationary 2-point target while the grating oscillated at a constant speed across the fovea (2) Subjects smoothly pursued the 2-point target superimposed on the oscillating grating and moving with it (3) Subjects smoothly pursued the 2-point target back and forth across the stationary grating. It was found that: (1) Inaccuracies of smooth pursuit eye movements produce substantial amounts of retinal image motion for target velocities greater than 1†/sec (2) Contrast thresholds during smooth pursuit were equal to contrast thresholds during maintained fixation when equal amounts of retinal image motion were present (3) Self-imposed and externally-imposed retinal image motions have equal effects on contrast detection (4) Improvements in contrast sensitivity were accompanied by improvements in smooth pursuit accuracy. These results imply that: (1) Visual sensitivity is not reduced by smooth pursuit eye movements. (2) The visibility of moving objects is primarily limited by velocity errors of smooth pursuit eye movements for the range of target velocities studied (49–420′/sec). |
| Starting Page | 521 |
| Ending Page | 530 |
| Page Count | 10 |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/0042-6989(78)90196-7 |
| PubMed reference number | 664333 |
| Journal | Medline |
| Volume Number | 18 |
| Alternate Webpage(s) | https://api.elsevier.com/content/article/pii/0042698978901967 |
| Alternate Webpage(s) | https://www.sciencedirect.com/science/article/pii/0042698978901967?dgcid=api_sd_search-api-endpoint |
| Alternate Webpage(s) | https://doi.org/10.1016/0042-6989%2878%2990196-7 |
| Journal | Vision Research |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
