July 2019
Volume 60, Issue 9
Open Access
ARVO Annual Meeting Abstract  |   July 2019
Low vision rehabilitation in patients with Boston type I keratoprosthesis implant
Author Affiliations & Notes
  • Nivea Nunes Ferraz
    Ophthalmology and Visual Science, Federal University of Sao Paulo, Sao Paulo, Sao Paulo, Brazil
  • Laura Emilia Michelin Gobbo
    Ophthalmology and Visual Science, Federal University of Sao Paulo, Sao Paulo, Sao Paulo, Brazil
  • Paula Baptista Eliseo da Silva
    Ophthalmology and Visual Science, Federal University of Sao Paulo, Sao Paulo, Sao Paulo, Brazil
  • Ariadne Stavare Leal
    Ophthalmology and Visual Science, Federal University of Sao Paulo, Sao Paulo, Sao Paulo, Brazil
  • Marcela Colussi Cypel
    Ophthalmology and Visual Science, Federal University of Sao Paulo, Sao Paulo, Sao Paulo, Brazil
  • Footnotes
    Commercial Relationships   Nivea Nunes Ferraz, None; Laura Emilia Michelin Gobbo, None; Paula Baptista Eliseo da Silva, None; Ariadne Stavare Leal, None; Marcela Colussi Cypel, None
  • Footnotes
    Support  None
Investigative Ophthalmology & Visual Science July 2019, Vol.60, 4020. doi:
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Nivea Nunes Ferraz, Laura Emilia Michelin Gobbo, Paula Baptista Eliseo da Silva, Ariadne Stavare Leal, Marcela Colussi Cypel; Low vision rehabilitation in patients with Boston type I keratoprosthesis implant. Invest. Ophthalmol. Vis. Sci. 2019;60(9):4020.

      Download citation file:


      © ARVO (1962-2015); The Authors (2016-present)

      ×
  • Supplements
Abstract

Purpose : Keratoprosthesis (Kpro) represents an advance in the treatment of patients with ocular surface disorders and corneal opacities. When low vision persists, functional visual loss may be minimized by magnification with optical devices. This study aimed to assess self-reported visual function and related quality of life in low vision patients with Boston type I Kpro referred to visual rehabilitation.

Methods : Adult subjects with best-corrected distance visual acuity from 0.6 to 1.5logMAR in the better-vision eye and referred to visual rehabilitation were included. Participants underwent monocular and binocular visual acuity (ETDRS chart) for distance (DVA) and near (NVA) measurements, optical device training and visual performance evaluation with the magnification. The WHO 25-item International Visual Functioning Questionnaire (VFQ) was applied in individual interviews before and after low vision rehabilitation. VFQ scores were calculated for the domains of visual functioning (VF: subdomains general vision, distant vision, near vision, sensory adaptation), quality of life (QL: subdomains pain, social activities, mental status) and vision related quality of life (VQL: VF and QL). Internal consistency of responses was measured by Cronbach’s alpha statistic.

Results : Six participants (5 males – 83%) aged 25 to 67 years (mean=48.5±13.7) were included. Mean binocular DVA was 0.92±0.13logMAR and NVA 0.86±0.11logMAR. All patients were enabled to use optical devices which were prescribed for distance (telescopes; 2.5x to 4.0x) in 83% and for near (spherical spectacle and hand-held magnifiers; 1.5x to 2.5x) in 50% of them, improving visual performance on average in 6 lines (logMAR chart). Before low vision rehabilitation, mean VF, QL and VQL scores were 58.0±17.2, 73.8±11.7 and 63.5±14.1, increasing 12.5, 4.8 and 9.8 points, respectively, after optical devices adaptation. There was a strong association between the subdomain distance vision score and the distance visual performance with optical magnification (r=0.73) as well as for near vision (r=0.99). Internal consistency of responses for VQL was 0.91 before and 0.80 after magnifiers usage.

Conclusions : Low vision rehabilitation enhanced the visual performance of this small group of patients, impacting positively on their quality of life. Optical devices should be considered as an alternative in the treatment of patients with Kpro and low vision.

This abstract was presented at the 2019 ARVO Annual Meeting, held in Vancouver, Canada, April 28 - May 2, 2019.

×
×

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.

×