• [Show abstract] [Hide abstract]
    ABSTRACT: To investigate the efficacy of a new surgical and rehabilitative procedure designed to improve vision in patients with central scotoma due to macular diseases. Case series of 40 consecutive surgical and rehabilitative procedures. Forty eyes of 35 consecutive patients with a stable central scotoma due to macular disease underwent phacoemulsification cataract surgery with the implant of the IOL-Vip System. The IOL-Vip System consists of a biconcave high minus-power intraocular lens (IOL) in the capsular bag and a biconvex high plus-power IOL in the anterior chamber, reproducing an intraocular Galilean telescope with x1.3 magnification for distance. Selection of the candidate patients was carried out by means of a low-vision diagnostic and rehabilitative program (IOL-Vip software) that evaluates the residual visual function of patients and prognosis for visual improvement based on simulation of the postoperative condition. The software also designs the rehabilitation strategies based on preoperative and postoperative training of the preferred retinal locus. Best-corrected visual acuity (BCVA), evaluated by means of the Early Treatment Diabetic Retinopathy Study charts and procedure; reading magnification; and reading distance. All patients showed an improvement of visual acuity (VA) due to the surgical and rehabilitative procedure, confirming or exceeding the preoperative expected results. Mean postoperative BCVA was 0.77 (logarithm of the minimum angle of resolution), compared with 1.28 preoperatively. The mean postoperative best reading magnification gain was x6.2, and the mean postoperative reading distance gain was 7.66 cm. No cases of intraoperative or postoperative complications were detected, and the implant was subjectively well tolerated in both monocular and binocular procedures. In this pilot study, the IOL-Vip System was shown to be effective and apparently well tolerated in improving the vision of patients with macular disease. Best-corrected VA, reading magnification, and reading distance improved in all cases of this low-vision patient series.
    Ophthalmology 06/2007; 114(5):860-5. · 5.56 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: To assess the effects of a visual rehabilitation program on visually impaired subjects' visual ability and ability to perform activities. Prospective observational study. Telephone interviews of respondents in their homes the week before admission to the rehabilitation center and 3 months and 1 year after discharge from the rehabilitation center. A total of 178 consecutive patients from the Hines Blind Rehabilitation Center participated in development of the 48-item Veterans Affairs Low Vision Visual Functioning Questionnaire (VA LV VFQ-48). Data were analyzed for 95 who participated in all 3 administrations of the questionnaire. Comprehensive blind rehabilitation program (mean hospital admission, 40 d). The self-report ratings of patients' difficulty performing 48 activities on the VA LV VFQ-48. The increase in visual ability +/- standard deviation of .981+/-.482 logits (equivalent to an 8-line improvement in visual acuity on an Early Treatment of Diabetic Retinopathy Study chart) at 3 months postrehabilitation decreased to .682+/-.485 logits (equivalent to a loss of 2.5 lines of visual acuity on the same chart) 1 year postrehabilitation. The effect sizes measured at 3 months (2.035) and 1 year (1.495) indicate large treatment effects corresponding to statistically significant differences for the increase in visual ability at 3 months and 1 year postrehabilitation (paired 2-tailed t tests, P<.001) relative to pretreatment measures. The difference in visual abilities measured at 3 months and 1 year posttreatment also is statistically significant (P<.001). Treatment effects decreased over the 12-month follow-up period. However, the group of patients whose data were analyzed was still statistically and clinically significantly better at their 1-year follow-up than before beginning treatment.
    Archives of Physical Medicine and Rehabilitation 06/2007; 88(6):691-5. · 2.44 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: To evaluate the effectiveness of a low-vision rehabilitation program. A multicenter randomized clinical trial was conducted from November 2004 to November 2006 with a 4-month follow-up. A total of 126 patients were included, 98% of whom were white and male. The patients were referred from eye or low-vision clinics and blind rehabilitation centers with a visual acuity in the better-seeing eye worse than 20/100 and better than 20/500 and were eligible for Veterans Affairs (VA) services. Telephone interviews of patients were conducted in their homes before and after participation in an outpatient low-vision program at a VA medical care facility or a (waiting list) control group. The interviewer administering questionnaires by telephone was masked to patients' assignments. Interventions included low-vision examination, counseling, and prescription and provision of low-vision devices and 6 weekly sessions provided by a low-vision therapist to teach use of assistive devices and adaptive strategies to perform daily living tasks independently. Change in patients' visual reading ability estimated from participant responses to the Veterans Affairs Low-Vision Visual Functioning Questionnaire (LV VFQ-48) reading items completed at baseline compared with 4 months after enrollment for the treatment and control groups. The secondary outcomes were changes in other visual ability domains (mobility, visual information processing, visual motor skills) and overall visual ability from baseline to 4 months estimated from VA LV VFQ-48 difficulty ratings for subsets of items. The treatment group demonstrated significant improvement in all aspects of visual function compared with the control group. The difference in mean changes was 2.43 logits (95% confidence interval [CI], 2.07-2.77; P < .001; effect size, 2.51) for visual reading ability; 0.84 logit (95% CI, 0.58-1.10; P < .001; effect size, 1.14) for mobility; 1.38 logits (95% CI, 1.15-1.62; P < .001; effect size, 2.03) for visual information processing; 1.51 logits (95% CI, 1.22-1.80; P < .001; effect size, 1.82) for visual motor skills; and 1.63 logits (95% CI, 1.40-1.86; P < .001; effect size, 2.51) for overall visual function. The program effectively provided low-vision rehabilitation for patients with macular diseases. APPLICATIONS TO CLINICAL PRACTICE: At least 10 hours of low-vision therapy, including a home visit and assigned homework to encourage practice, is justified for patients with moderate and severe vision loss from macular diseases. Because the waiting-list control patients demonstrated a decline in functional ability, low-vision services should be offered as early as possible. clinicaltrials.gov Identifier: NCT00223756.
    Archives of ophthalmology 06/2008; 126(5):608-17. · 3.86 Impact Factor

Full-text

Download
10 Downloads
Available from
Aug 4, 2014