The evaluation of corneal topographic parameters with corneal and lens densitometers in pediatric keratoconus
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ORIGINAL PAPER
The evaluation of corneal topographic parameters with corneal and lens densitometers in pediatric keratoconus Selma Urfalıoglu
. Mete Guler
Received: 23 January 2020 / Accepted: 1 October 2020 Springer Nature B.V. 2020
Abstract Purpose The aim of this study was to compare corneal and lens densitometric measurements and corneal topographic parameters of pediatric keratoconus patients and healthy individuals. Methods The data of the Pentacam HR device and the database of our hospital between 2017 and 2019 were analyzed retrospectively. A total of 80 eyes of 47 keratoconus children (one eye of 14 children and two eyes of 33 children) in the Group KC (n = 80); and 74 eyes of 37 children were assessed in healthy children, Group HC (n = 74). The corneal density was measured manually in full-thickness cornea with a diameter of 2 mm in the corneal apex. The lens density (LD) was measured manually in the pupillary area with a diameter of 2 mm throughout the whole central lens thickness in 3D mode. Results The corneal density values were significantly higher in Group KC (12.72 ± 1.68, 1.00 ± 0.34, 16.36 ± 2.32, respectively) compared to Group HC (9.81 ± 1.02, 0.61 ± 0.28, 12.42 ± 1.44, respectively) (p \ 0.001). LD-mean and LD-sd measurements were lower in Group KC (7.55 ± 0.48, 0.61 ± 0.49, respectively) compared to
S. Urfalıoglu (&) M. Guler Department of Ophthalmology, Kahramanmaras Sutcu Imam University Faculty of Medicine, Avsar Campus, 46100 Onikisubat, Kahramanmaras, Turkey e-mail: [email protected]
Group HC (7.75 ± 0.39, 0.81 ± 0.49, respectively) (p = 0.004, p = 0.014, respectively). Conclusion It was found that corneal density increased and lens density decreased in pediatric keratoconus patients. These results showed that there may be factors that prevent or delay lens changes in isolated pediatric keratoconus patients. Keywords Corneal topography Corneal densitometry Lens densitometry Keratoconus Pediatric
Introduction Keratoconus is a corneal ectatic disorder that results in thinning of the cornea due to disruptions to collagen structure [1]. It usually starts in early childhood and puberty, and equally affects both sexes. The risk factors that are associated with the onset and progression of keratoconus include frequently and vigorously rubbing eyes, atopy, genetic predisposition and exposure to toxic materials [2]. Although keratoconus usually presents as an isolated disease, it may be associated with systemic disorders such as Marfan syndrome, Down syndrome and several connective tissue disorders. The estimated prevalence is 1 in 2000, which varies depending on geographical location and risk factors [3].
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Int Ophthalmol
Pediatric keratoconus is more aggressive due to ongoing corneal collagen remodeling in children [3]. Despite this different course, the treatment methods developed for adult patients—including corneal collagen cross-linking, wearing contact lenses, intracorneal ring segment implantation and keratoplasty—
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