A
weekly e-journal by Art Epstein, OD, FAAO
Volume 11, Number 39 |
Monday, September 26, 2011 |
Optometry often beats itself up and may be its own worst enemy, yet we are also among the
most caring and giving of all healthcare professions.
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Gunshot Wound to the Eye and Orbit: a Descriptive Case Series and Literature Review | ||||
The objective of this study is to report ocular and orbital findings in a series of six patients (8 eyes) with
gunshot wounds and to review the literature on the pathophysiology, management and outcome of such patients. Main
outcome measures of this retrospective case series and review of the literature were ocular and orbital injury,
surgical intervention and presenting and final visual acuity.
Six male patients (mean age, 32 years) were enrolled. Three patients with globe concussion and low presenting visual acuity were treated by observation. Two patients (25%) underwent primary enucleation or evisceration. Retinal detachment developed in one patient who had a globe perforation, and he underwent vitrectomy and lensectomy with silicone oil injection. Visual acuity remained unchanged in all but one patient who underwent retinal detachment surgery. Final visual acuity was poor in all patients, with five eyes ending in no perception of light. Four patients had orbital fractures, two of whom underwent orbital reconstruction. One of these patients also underwent drainage of orbital abscess, eyelid surgery, and a dacryocystorhinostomy. The mean follow-up time was 26 months. Gunshot wounds to the eye and orbit cause severe open and closed ocular injuries with guarded outcome and poor visual acuity. When feasible, initial wound closure may preserve the globe and allow further surgical rehabilitation. Primary evisceration may be required in cases of a severely ruptured globe. Orbital surgery may be needed in cases of infection, orbital wall disruption with disfigurement, or late enophthalmos. |
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SOURCE: Ben Simon GJ, Moisseiev J, Rosen N, Alhalel A. Gunshot wound to the eye and orbit: a descriptive case series and literature review. J Trauma. 2011;71(3):771–8. |
Variation in Optic Nerve and Macular Structure with Age and Race with Spectral-Domain Optical Coherence Tomography | ||||
A total of 350 adult subjects without ocular disease were examined to evaluate the effects of
age and race on optic disc, retinal nerve fiber layer and macular measurements with spectral-domain
optical coherence tomography (SD-OCT). Data from SD-OCT imaging of the optic nerve head, peripapillary retinal
nerve fiber layer (RNFL) and macula of 632 eyes from 350 subjects without ocular disease were imaged with
SD-OCT. Multivariate models were used to determine the effect of age and race on quantitative measurements of
optic disc, RNFL and macula.
For optic nerve parameters, participants of European descent had significantly smaller optic disc area than other groups, and Indian participants had significantly smaller rim area than other groups. Indian and Hispanic participants had thicker global RNFL measurements than other groups. Participants of African descent were associated with thinner inner retinal thickness in the macula. Age was associated with several parameters, with rim area reducing by 0.005 mm²/year, RNFL thickness reducing by 0.18 µm/year, and inner retinal thickness by 0.1 µm/year. Optic nerve, RNFL and macular measurements with SD OCT all varied across racial groups and with age. These differences are important in defining the range of normal variation in differing populations and should be considered in the use of these instruments in the detection of optic nerve and macular disease across these population groups. |
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SOURCE: Girkin CA, McGwin G Jr, Sinai MJ, et al. Variation in optic nerve and macular structure with age and race with spectral-domain optical coherence tomography. Ophthalmology. 2011; Sep 9 [Epub ahead of print]. |
Ophthalmic Manifestations of Mosaic Down Syndrome | ||||
The cognitive and physical stigmata of mosaic Down Syndrome (DS) are often considered to be
less severe than complete trisomy-21 DS. In contrast to complete trisomy-21 DS, the ophthalmic manifestations
in mosaic DS have rarely been reported. The aim of this study is to report clinically significant ophthalmic
abnormalities in a cohort of individuals with mosaic DS. A prospective cross-sectional observational case series
was designed to evaluate ophthalmic manifestations of mosaic DS. Individuals with mosaic DS were recruited and
examined at the biennial meeting of the International Mosaic Down Syndrome Association. A medical, surgical
and ocular history was obtained. Each subject received a complete eye examination on site, including assessment
of visual acuity, alignment, motility, sensory function, accommodation, anterior segment, fundus and
cycloplegic refraction.
Seventeen individuals with mosaic DS (mean age, 9 years; range, 6 months to 32 years) underwent eye examinations. Clinically significant refractive errors were present in 41% of the subjects, accommodative insufficiency in 59%, strabismus in 35%, nystagmus in 6%, and cataract in 6%. Ten individuals completed optotype visual acuity testing. Mean LogMAR acuity of the better eye of each subject was 0.2 (20/32 equivalent). Clinically significant ophthalmic disorders are common among children and young adults with mosaic DS. Our findings support regular periodic eye examinations for these individuals. |
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SOURCE: Motley WW 3rd, Saltarelli DP. Ophthalmic manifestations of mosaic Down Syndrome. J AAPOS. 2011;15(4):362–6. |
Our colleagues in Puerto Rico need help in expanding their scope of practice.
After years of being rebuffed it's time to allow Optometrists in Puerto Rico to prescribe
therapeutic pharmaceutical agents!
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News & Notes | ||
REICHERT LAUNCHES iPAC PACHYMETER. Reichert Technologies has announced the launch of the all-new iPac Pachymeter, which promises to impress with features such as Bluetooth wireless connectivity, one-button navigation, rotating color LCD screen and rechargeable lithium ion battery. For additional information, click here. | ||
TEARS AGAIN HYDRATE SHOW PROMISE IN DRY EYE STUDY. OCuSOFT, Inc. has announced the results of a recent study published in Clinical Ophthalmology evaluating the effects of the company's Tears Again HYDRATE, a proprietary blend of omega-3 and omega-6 essential fatty acids, on dry eye signs and symptoms with or without concomitant topical cyclosporine A. Significantly, the findings demonstrate that Tears Again HYDRATE improved tear breakup time (TBUT) and relieved patient symptoms, while the addition of topical cyclosporine did not convey any statistically significant improvement in TBUT beyond that achieved by the supplement alone. Visit www.tearsagainhydrate.com for more. | ||
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