Relationship between Ocular Axial Length and Height in Port Harcourt City, Nigeria.: General Ophthalmology

IN Aprioku; AO Adio; B Fiebai

Authors

IN Aprioku Department of Ophthalmology, Braithwaite Memorial Specialist Hospital, Port Harcourt, Nigeria.
AO Adio Department of Ophthalmology, University of Port Harcourt Teaching Hospital, Alakahia, Port Harcourt, Nigeria.
B Fiebai Department of Ophthalmology, University of Port Harcourt Teaching Hospital, Alakahia, Port Harcourt, Nigeria.

Abstract

Introduction: Axial length (AL) is defined as the distance between the anterior and the posterior poles of the eye[1,2]. It is one of the most important biometric parameters in the eye required for the calculation of intraocular lens power[3,4]. Several studies have been carried out in various countries to determine axial length and the relationship between axial length and height[5,6,7]. This study aimed at investigating the relationship between Ocular axial length (AL) and height in a normal adult population, with a view to deriving possible usable working formulae in estimating intraocular lens power for cataract surgeries in resourcechallenged settings

Methods: A community based descriptive cross sectional study carried out on adults aged 18 years and above between the 6th of January 2014 and 31st of March 2014 using multistage simple random sampling in 4 stages. Ethical clearance was obtained from the University of Port Harcourt Teaching hospital ethical committee. Inclusion criteria of Visual Acuity > 6/18, no history of past ocular surgeries or trauma were used. Sample size was calculated using Sathian et al[8], formula for means with a 13% non-response rate. 466 individuals were randomly selected from 4 randomly selected communities out of 11 communities in Port Harcourt City LGA. The number of those selected in each community was determined using probability proportion to the size of each community. A team comprising of the researcher, 2 second year ophthalmology residents, 2 ophthalmic technicians, 2 research assistants, an ophthalmic nurse and a community guide administered to access sociodemographic data. Height was measured using a standard height utomated scale (SECA 769,220). Visual acuity and fundoscopy were done while axial length (AL) was measured using Amplitude (A) scan ultrasonography (SONOMED PACSCAN 300AP). Data obtained from one eye of the subjects were analyzed using SPSS (Version 17). There was no financial support

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