title: Utility of large spot binocular indirect laser delivery for peripheral photocoagulation therapy in children.
abstract: The purpose of this article is to demonstrate the utility of the large spot size (LSS) setting using a binocular laser indirect delivery system for peripheral ablation in children. One patient with bilateral retinopathy of prematurity received photocoagulation with standard spot size burns placed adjacently to LSS burns. Using a pixel analysis program called Image J on the Retcam picture, the areas of each retinal spot size were determined in units of pixels, giving a standard spot range of 805 to 1294 pixels and LSS range of 1699 to 2311 pixels. Additionally, fluence was calculated using theoretical retinal areas produced by each spot size: the standard spot setting was 462 mJ/mm2 and the LSS setting was 104 mJ/mm2. For eyes with retinopathy of prematurity, our study shows that LSS laser indirect delivery halves the number of spots required for treatment and reduces fluence by almost one-quarter, producing more uniform spots.
authors.affiliation: Department of Ophthalmology, Mayo Clinic and Mayo Foundation, Rochester, Minnesota 55905, USA.
authors.forename: Saranya C
authors.initials: SC
authors.lastname: Balasubramaniam
authors.forename: Brian G
authors.initials: BG
authors.lastname: Mohney
authors.forename: Genie M
authors.initials: GM
authors.lastname: Bang
authors.forename: Thomas P
authors.initials: TP
authors.lastname: Link
authors.forename: Jose S
authors.initials: JS
authors.lastname: Pulido
mesh_terms: D000293:Adolescent; D002648:Child; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D017075:Laser Coagulation / Q000295:instrumentation / Q000379:methods*; D008297:Male; D019721:Ophthalmoscopes; D015868:Pars Planitis / Q000601:surgery*; D058456:Retinal Telangiectasis / Q000601:surgery*; D031300:Retinal Vasculitis / Q000601:surgery*; D012178:Retinopathy of Prematurity / Q000601:surgery*; D012189:Retrospective Studies; D016896:Treatment Outcome; D014792:Visual Acuity / Q000502:physiology