Joseph F Pasternak

Walter Reed National Military Medical Center, Washington, Washington, D.C., United States

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Publications (4)9.75 Total impact

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    ABSTRACT: Purpose To compare visual outcomes following Visx Star S4 Customvue wavefront-guided and Allegretto Wave Eye-Q 400 Hz wavefront-optimized photorefractive keratectomy (PRK). Setting Warfighter Refractive Eye Surgery Program and Research Center, Fort Belvoir, Virginia, and Walter Reed National Military Medical Center, Bethesda, Maryland, USA. Design Prospective randomized clinical trial. Methods Active-duty United States military soldiers were randomized to have wavefront-guided (Visx Star S4 Customvue) or wavefront-optimized PRK. Participants were followed up to 12 months postoperatively. Primary outcome measures were uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), and manifest spherical equivalent (SE). Secondary outcome measures included refractive astigmatism, higher-order aberrations (HOAs), contrast sensitivity, subjective visual complaints, and patient satisfaction. Results The study evaluated 108 soldiers (mean age 30.3 years ± 6.3 [SD]; mean manifest SE -3.51 ± 1.63 D). At 12 months postoperatively, achieved UDVA, CDVA, manifest SE, and refractive astigmatism were comparable between wavefront-guided and wavefront-optimized groups (P >.213). Spherical aberration and total HOAs significantly increased from baseline in both groups (P <.006). The change in coma, trefoil, spherical aberration, and total HOAs (P >.254) were comparable between groups. There were fewer losses of photopic low-contrast visual acuity (LCVA) at 5% contrast after wavefront-guided compared to wavefront-optimized treatment (P =.003). There was no significant difference between treatment groups in visual symptoms, overall vision expectation, and satisfaction (P >.075). Conclusion Wavefront-guided treatment offered a small advantage in photopic LCVA. Refractive outcomes, HOAs, self-reported visual difficulties, overall vision expectation, and satisfaction were otherwise comparable between wavefront-guided and wavefront-optimized treatments. Financial Disclosure No author has a financial or proprietary interest in any material or method mentioned.
    No preview · Article · Oct 2015 · Journal of Cataract and Refractive Surgery
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    ABSTRACT: Major decisions regarding life and death are routinely made on the modern battlefield, where visual function of the individual soldier can be of critical importance in the decision-making process. Glasses in the combat environment have considerable disadvantages: degradation of short term visual performance can occur as dust and sweat accumulate on lenses during a mission or patrol; long term visual performance can diminish as lenses become increasingly scratched and pitted; during periods of intense physical trauma, glasses can be knocked off the soldier’s face and lost or broken. Although refractive surgery offers certain benefits on the battlefield when compared to wearing glasses, it is not without potential disadvantages. As a byproduct of refractive surgery, elevated optical aberrations can be induced, causing decreases in contrast sensitivity and increases in the symptoms of glare, halos, and starbursts. Typically, these symptoms occur under low light level conditions, the same conditions under which most military operations are initiated. With the advent of wavefront aberrometry, we are now seeing correction not only of myopia and astigmatism but of other, smaller optical aberrations that can cause the above symptoms. In collaboration with the Warfighter Refractive Eye Surgery Program and Research Center (WRESP-RC) at Fort Belvoir and Walter Reed National Military Medical Center (WRNMMC), the overall objective of this study is to determine the impact of wavefront guided (WFG) versus wavefront-optimized (WFO) photorefractive keratectomy (PRK) on military task visual performance. Psychophysical perception testing was conducted before and after surgery to measure each participant’s performance regarding target detection and identification using thermal imagery. The results are presented here.
    No preview · Conference Paper · Jun 2014
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    ABSTRACT: As the rate of terrorism increases, it is important for health care providers to become familiar with the management of injuries inflicted by blasts and explosions. This article reviews the ocular injuries associated with explosive blasts, providing basic concepts with which to approach the blast-injured patient with eye trauma. We conducted a literature review of relevant articles indexed in PubMed between 1948 and 2007. Two hundred forty-four articles were reviewed. We concluded that ocular injury is a frequent cause of morbidity in blast victims, occurring in up to 28% of blast survivors. Secondary blast injuries, resulting from flying fragments and debris, cause the majority of eye injuries among blast victims. The most common blast eye injuries include corneal abrasions and foreign bodies, eyelid lacerations, open globe injuries, and intraocular foreign bodies. Injuries to the periorbital area can be a source of significant morbidity, and ocular blast injuries have the potential to result in severe vision loss.
    No preview · Article · Jun 2010 · Disaster Medicine and Public Health Preparedness
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    ABSTRACT: To review the incidence, culture results, clinical course, management, and visual outcomes of infectious keratitis after photorefractive keratectomy (PRK) at 6 Army and Navy refractive surgery centers. Retrospective study. Twelve thousand six hundred sixty-eight Navy and Army sailors and service members. Army and Navy refractive surgery data banks were searched for cases of infectious keratitis. A retrospective chart review and query of the surgeons involved in the care of those patients thus identified provided data regarding preoperative preparation, perioperative medications, treatment, culture results, clinical course, and final visual acuity. Between January 1995 and May 2004, we performed a total of 25337 PRK procedures at the 6 institutions. Culture proven or clinically suspected infectious keratitis developed in 5 eyes of 5 patients. All patients received topical antibiotics perioperatively. All cases presented 2 to 7 days postoperatively. Cultures from 4 cases grew Staphylococcus, including 2 methicillin-resistant S. aureus (MRSA). One case of presumed infectious keratitis was culture negative. There were no reported cases of mycobacterial or fungal keratitis. In addition, we identified 26 eyes with corneal infiltrates in the first postoperative week that were felt to be sterile, and which resolved upon removal of the bandage contact lens and increasing antibiotic coverage. Infectious keratitis is a rare but potentially vision-threatening complication after PRK. It is often caused by gram-positive organisms, including MRSA. Early diagnosis, appropriate laboratory testing, and aggressive antimicrobial therapy can result in good outcomes.
    No preview · Article · May 2006 · Ophthalmology

Publication Stats

54 Citations
9.75 Total Impact Points

Institutions

  • 2014-2015
    • Walter Reed National Military Medical Center
      Washington, Washington, D.C., United States