Elsevier

Ophthalmology

Volume 113, Issue 5, May 2006, Pages 786-791
Ophthalmology

Original Article
Retinal Nerve Fiber Layer Thickness in Normal Children Measured with Optical Coherence Tomography

https://doi.org/10.1016/j.ophtha.2006.01.036Get rights and content

Purpose

To measure the peripapillary retinal nerve fiber layer (RNFL) thickness in normal children.

Design

Observational cross-sectional study.

Participants

Ninety-two eyes of 92 normal children ages 4 to 17 years presenting to the Ophthalmology Clinic at the Harkness Eye Institute, Department of Ophthalmology, Columbia University.

Methods

Retinal nerve fiber layer thickness was measured with optical coherence tomography (OCT). Patient cooperation and signal strength of the OCT scans were assessed. Optic disc photographs were evaluated by a glaucoma specialist in a masked fashion. Eyes with abnormal optic discs were excluded. One eye of each subject was randomly selected for statistical analysis. The effect of several factors on RNFL thickness was investigated statistically.

Main Outcome Measures

Retinal nerve fiber layer thickness.

Results

Ninety-one percent of the study subjects were Hispanic; 8%, African American; and 1%, Caucasian. Optical coherence tomography measurements were obtained in 117 of 121 (96.7%) subjects, and disc photographs were available for 92 of them. Mean age (±standard deviation [SD]) was 9.7±2.7 years. Mean global RNFL thickness (±SD) was 107.0±11.1 μm (range, 78.1–134.6). The RNFL was thickest inferiorly (136.9±16.9 μm) and superiorly (135.4±19.3 μm), thinner nasally (83.0±18.0 μm), and thinnest temporally (72.5±13.4 μm). In univariate regression analysis, age (P = 0.013) and refraction (P<0.001) had a significant effect on RNFL thickness; age had a significant effect on refraction (P<0.001). When controlling for refraction, age no longer had a significant effect.

Conclusions

Optical coherence tomography can be used to measure RNFL thickness in children. Refraction had an effect on RNFL thickness. In normal children, variation in RNFL thickness is large. The normative data provided by this study may assist in identifying changes in RNFL thickness in children.

Section snippets

Subjects

All subjects were recruited from patients ages 4 to 17 years presenting to the ophthalmology clinic in the Edward S. Harkness Eye Institute (Department of Ophthalmology, Columbia University, New York, New York). To be enrolled, subjects had to have no ocular problems other than refractive error. In particular, children with strabismus or amblyopia were excluded. Also, children with neurological, metabolic, vascular, or other disorders were excluded. All subjects received a full ophthalmic

Demographics

One hundred twenty-one subjects consented to participate in this study. Of these, 4 (3.3%) would not cooperate for the OCT imaging (3 were 4 years old, and 1 was 5). Of the remaining 117 subjects, 20 were excluded because of the lack of disc photographs, 3 because of disc photographs of insufficient quality to assess, 1 because of abnormal discs, and 1 because of pathologic myopia. Thus, 92 subjects were eligible for statistical analysis. After random selection of one eye of each subject, 46

Discussion

In this study, we investigated the peripapillary RNFL thickness in normal children as measured with the latest version of OCT (Stratus OCT). Also, we determined the effects of age, refraction, and other factors on RNFL thickness and evaluated cooperation for OCT measurements among children.

Optical coherence tomography has become a widely used tool in clinical and scientific ophthalmology. However, its use in children has been limited by the lack of normative data, and its feasibility of

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    Manuscript no. 2005-623.

    Supported by a Career Development Award from Research to Prevent Blindness, New York, New York (MFC), and by the National Eye Institute, Bethesda, Maryland (grant no.: EY13972 [MFC]).

    The authors have no financial interest in the devices or techniques used in the study.

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