Initial reading speeds across grades show points at which children with low vision are at risk of developing low literacy skills. Outcome group measures showed that children who received optical devices increased their silent reading speeds and comprehension rates. Findings indicate the provision of optical devices offer a benefit for deciphering text but not for the mechanics of reading.
Purpose
Crowding, the adverse spatial interaction due to the proximity of adjacent targets, has been suggested as an explanation for slow reading in peripheral vision. Previously, we showed that increased line spacing, which presumably reduces crowding between adjacent lines of text, improved reading speed in the normal periphery (Chung, Optom Vis Sci 2004;81:525–35). The purpose of this study was to examine whether or not individuals with age-related macular degeneration (AMD) would benefit from increased line spacing for reading.
Methods
Experiment 1: Eight subjects with AMD read aloud 100-word passages rendered at five line spacings: the standard single spacing, 1.5×, 2×, 3×, and 4× the standard spacing. Print sizes were 1× and 2× of the critical print size. Reading time and number of reading errors for each passage were measured to compute the reading speed. Experiment 2: Four subjects with AMD read aloud sequences of six 4-letter words, presented on a computer monitor using the rapid serial visual presentation (RSVP) paradigm. Target words were presented singly, or flanked above and below by two other words that changed in synchrony with the target word, at various vertical word separations. Print size was 2× the critical print size. Reading speed was calculated based on the RSVP exposure duration that yielded 80% of the words read correctly.
Results
Averaged across subjects, reading speeds for passages were virtually constant for the range of line spacings tested. For sequences of unrelated words, reading speeds were also virtually constant for the range of vertical word separations tested, except at the smallest (standard) separation at which reading speed was lower.
Conclusions
Contrary to the previous finding that reading speed improved in normal peripheral vision, increased line spacing in passages, or increased vertical separation between words in RSVP, did not lead to improved reading speed in people with AMD.
Providing Access to the Visual Environment (Project PAVE) is a statewide multidisciplinary project that provides low vision services to children aged 3–21 in Tennessee. This article describes the project's administrative, direct service, and research components and the philosophy on which it is based.
Describes techniques for evaluating a multiply impaired child's functional level of vision and gives a sequence of vision stimulation for those children found to have vision. Stresses the importance of creativity and flexibility on the part of the teacher and underscores the need for piecing together whatever functional information the child may reveal to various individuals, including parent, educator, and doctor.
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