RESULT:Of 170 children between the age of 5-17 years who were enrolled for the study the mean RNFL thickness was 110.81 ± 13.74 in RE and 110.77 ± 12.39 in LE (P = 0.954). Further mean RNFL thickness of the two eyes was assessed in the 4 quadrants and the difference of RNFL thickness in 4 quadrants was statistically significant in BE (P = 0.0001) . CONCLUSION: The normative data values of RNFL thickness in children was assessed as it will be helpful while interpreting the RNFL thickness of children having glaucoma or other Retinal or Optic nerve diseases.
INTRODUCTIONOCT is a non -invasive, non-contact, transpupillary imaging method that performs objective high resolution cross-sectional images of retinal tissue. Spectral domain OCT is currently the most advanced commercially available application of OCT technology. Cirrus HD-OCT is a spectral domain OCT with a speed of 27,000 A scans/ sec and a resolution of 5 µm [1] . It allows faster scanning and higher resolution images than the time domain OCT technology. Cirrus HD-OCT 4000 scans the optic disc and peripapillary RNFL in a 6 mm² area consisting of 200 × 200 scanning grid. Due to its greater acquisition speed and high image resolution, it is very useful for the examination of children.All OCT devices have an integrated normative database only for adult subjects >18 years. The reported normative values of RNFL thickness in children using time domain OCT devices are available but very limited. Using SD-OCT, normal reference values of RNFL thickness are needed in paediatric population as the software in Cirrus SD OCT has no paediatric normogram for comparison.The primary objective of this study is to provide a normative ABSTRACT AIM: Cirrus Optical coherence tomography (OCT) provides high resolution cross-sectional images of retina, vitreous and optic nerve head with an axial resolution of 6 μm and a reproducibility of 1.6 μm. There is an availability of integrated normative database only for adult subjects >18 years but the normal reference ranges of (retinal nerve fibre layer) RNFL thickness in paediatric population for comparison is lacking. With this background in mind the present study was undertaken. MATERIALS AND METHODS: 340 eyes of 170 children between 5 to 17 years of age were recruited for study. Full ophthalmic examination was done including visual acquity, cycloplegic refraction, fundus, intraocular pressure, ocular motility and alignment. RNFL measurements were obtained through dilated pupils using Cirrus HD OCT.