Closed circuit television systems (CCTV) used by the visually impaired are influenced by the user's functional vision and the quality of the image appearing on the video monitor. There are no current instructions for adjustment of the CCTV for specific visual needs. / Seven legally blind children between the ages of 13 and 17 years participated in a multiple single case study concerned with the enhancement of visual stimulation during use of a CCTV. This research involved assessment of the child's functional vision by contrast sensitivity (CS) and identified a series of steps which used that data for adaptation of the CCTV for the individual visual requirements of the child. / Changes in rates of correct and incorrect responses to letters viewed on the video monitor relative to child-adjusted and researcher CS-adjusted settings were compared. A statistically significant increase in correct responses was associated with the experimentally-adjusted CCTV. No increase in incorrect responses was noted. These findings suggest that application of this procedure may improve the reading efficiency of visually impaired persons during use of CCTV systems. Recommendations for further research and an extensive bibliography are included. / Source: Dissertation Abstracts International, Volume: 47-03, Section: A, page: 0862. / Thesis (Ph.D.)--The Florida State University, 1986.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_75787 |
| Contributors | HENSLEY, GERALD JAMES., Florida State University |
| Source Sets | Florida State University |
| Detected Language | English |
| Type | Text |
| Format | 168 p. |
| Rights | On campus use only. |
| Relation | Dissertation Abstracts International |
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