Original Research

Relationship between biometry, fovea, and choroidal thickness in Nigerian children with myopia

Chukwuemeka Junior Obinwanne, Kovin S. Naidoo, Khathutshelo P. Mashige
African Vision and Eye Health | Vol 83, No 1 | a834 | DOI: https://doi.org/10.4102/aveh.v83i1.834 | © 2024 Chukwuemeka Junior Obinwanne, Kovin S. Naidoo, Khathutshelo P. Mashige | This work is licensed under CC Attribution 4.0
Submitted: 03 February 2023 | Published: 25 January 2024

About the author(s)

Chukwuemeka Junior Obinwanne, Department of Cornea, Contact Lens, and Myopia Management Services, De Lens Ophthalmics Family Eye and Vision Care Center, Abuja, Nigeria; and Discipline of Optometry, African Vision Research Institute, University of KwaZulu-Natal, Durban, South Africa
Kovin S. Naidoo, Discipline of Optometry, African Vision Research Institute, University of KwaZulu-Natal, Durban, South Africa
Khathutshelo P. Mashige, Discipline of Optometry, African Vision Research Institute, University of KwaZulu-Natal, Durban, South Africa

Abstract

Background: Understanding the relationship between biometric and structural changes in childhood myopia is necessary to effectively manage myopia progression.

Aim: To determine the relationship between ocular biometry, fovea and sub-fovea choroidal thickness in school-aged children with myopia of Nigerian descent.

Setting: Abuja, Nigeria.

Methods: This study involved 189 children (117 girls and 72 boys), and myopia was defined as cycloplegic spherical equivalent refraction (SER) of ≤ −0.50 D. Keratometry values, biometry data, fovea and sub-foveal choroidal thickness (SFChT) values were obtained from medical records retrospectively and analysed.

Results: The median age was 13 years (interquartile range [IQR]: 5). The median SER, fovea and SFChTs were −2.63 D (IQR: 3.38), 249 μm (IQR: 118) and 225 μm (IQR: 341), respectively. Male children had flatter corneas, thicker fovea and thinner SFChT compared to female children. The vitreous chamber and axial length were longer and sub-fovea choroid was thinner in children with high myopia. There was a weak but significant positive correlation between myopia and sub-fovea choroidal thickness (r = 0.270 respectively, P < 0.01). A moderate negative correlation was found between myopia and vitreous chamber depth (r = −0.536, P < 0.001), and a strong negative correlation was found between myopia and axial length (r = −0.706, P < 0.001).

Conclusion: Myopia in school-aged Nigerian children is associated with sub-fovea choroidal thinning, increased vitreous chamber depth and axial elongation.

Contribution: This study provides data on the relationship between ocular biometry, fovea and sub-foveal choroidal thickness in school-aged Nigerian children with myopia.


Keywords

myopia; biometry; retina; choroid; axial length

Sustainable Development Goal

Goal 3: Good health and well-being

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