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Tom H Williamson - One of the best experts on this subject based on the ideXlab platform.

  • Characteristics of Rhegmatogenous Retinal Detachment and their relationship to success rates of surgery.
    Retina, 2014
    Co-Authors: Tom H Williamson, Edward J Lee, Manoharan Shunmugam
    Abstract:

    PURPOSE To determine features of Rhegmatogenous Retinal Detachment predictive of anatomical success with surgical procedure. METHODS All patients undergoing surgery at a tertiary referral practice had contemporaneous data collection in an electronic database. Overall, 847 eyes from 847 patients undergoing surgical procedure for Rhegmatogenous Retinal Detachment were included in this study. RESULTS Mean age was 62.2 years with 60% male subjects and 56% right eyes. Mean postoperative follow-up was 9.6 months (range, 6 weeks to 10 years). With univariate analysis, the presence of superotemporal breaks was associated with a reduction in the chance of failed primary surgery (P = 0.005); detached inferonasal breaks (P = 0.002), proliferative vitreoretinopathy (PVR) (P < 0.0001), breaks in detached inferior retina (P < 0.0001), fovea off (P = 0.001), and 4-quadrant Rhegmatogenous Retinal Detachment (P < 0.0001) increased the risk of failure. After multivariate analysis PVR, detached inferior breaks, increased number of breaks, and 4-quadrant Detachment remained associated with an increased risk of failure, and superotemporal detached breaks with the reduced risk of failure (r(2) = 0.08). For patients without PVR, only inferonasal detached breaks and 3 to 4 quadrants of Detachment remained predictive of failure (r(2) = 0.04). For patients with PVR (n = 120), multivariate analysis showed that PVR C4-12 and posterior breaks increased the failure risk and detached superotemporal breaks reduced the risk of failure (r(2) = 0.22). CONCLUSION Number of breaks, inferior positioning of breaks, the extent of Rhegmatogenous Retinal Detachment, and PVR are associated with failed primary surgery.

  • Characteristics of Rhegmatogenous Retinal Detachment and their relationship to visual outcome
    Eye, 2013
    Co-Authors: Tom H Williamson, Manoharan Shunmugam, Ian A. Rodrigues, Mahmut Dogramaci, Edward J Lee
    Abstract:

    Characteristics of Rhegmatogenous Retinal Detachment and their relationship to visual outcome

  • horizontal and vertical micropsia following macula off Rhegmatogenous Retinal Detachment surgical repair
    Graefes Archive for Clinical and Experimental Ophthalmology, 2006
    Co-Authors: Marta Ugarte, Tom H Williamson
    Abstract:

    BACKGROUND: Dysmetropsia or distorted image size perception (smaller: micropsia; larger: macropsia) is known to occur after successful surgical re-attachment for macula-off Rhegmatogenous Retinal Detachment. However, the vertical and horizontal components of size distortion have not been previously quantified separately. The purpose of this article is to describe horizontal and vertical dysmetropsia occurring in patients following pars plana vitrectomy and gas treatment (octafluoropropane, C(3)F(8) or sulfur hexafluoride, SF(6)) for macula-off Rhegmatogenous Retinal Detachment. MATERIAL AND METHODS: Four patients (mean+/-SD, 59+/-8 years; three women and one man) who had had pars plana vitrectomy and gas treatment for macula-off Rhegmatogenous Retinal Detachment 6-7 months earlier underwent ocular examination, best corrected visual acuity test, threshold horizontal and vertical dysmetropsia measurement using a computerised version of the New Aniseikonia Test, slit-lamp examination and optical coherence tomography of the macula. RESULTS: All patients had binocular visual complaints including difficulty judging distances or reading, rivalry or asthenopia. The logMAR visual acuity (mean+/-SD) in the operated eye was 0.52+/-0.199 and 0.02+/-0.171 in the unaffected eye. All patients perceived the image as smaller (micropsia) with the affected eye, with differences ranging from -9 to 0%. Four patients showed 3% or more size difference between horizontal and vertical meridians. CONCLUSIONS: Dysmetropsia does occur in symptomatic patients following successful surgical repair of macula-off Rhegmatogenous Retinal Detachment by pars plana vitrectomy and gas treatment. The effect on image size is heterogenous across the Retinal area affected.

Dennis S C Lam - One of the best experts on this subject based on the ideXlab platform.

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Chi Wai Tsang - One of the best experts on this subject based on the ideXlab platform.

M M Lai - One of the best experts on this subject based on the ideXlab platform.