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Aim: To determine the socio demographic distribution of ocular axial length (AL) for use in estimating intraocular lens power, detect abnormal values and possibly associate them with pathological conditions. Methods: This is a community based descriptive study carried out in Port Harcourt City LGA, Nigeria of subjects 18 years of age or older and with Visual Acuity > 6/18. The major ethnic/linguistic groups in Rivers state are Ikwerre, Ogoni, Ekpeye Kalabari, Okrika, Ogba, Igbani, Obolo and Etche. Socio demographic data was obtained through a proforma. Ocular examinations done included visual acuity, applanation tonometry, and ophthalmoscopy. Axial length (AL) was measured using Amplitude (A) scan ultrasonography (SONOMED PACSCAN 300AP). Data analysis was by SPSS (Version 17), and p value was set at ≤ 0.05. Results: Four hundred and sixty six (466) subjects participated in the study made up of two hundred and twelve (212) males (45.5%) and two hundred and fifty four (254) females (54.5%) with M: F ratio of 1:1.2. The age range was 18-92 years and mean age of the subjects studied 43.0±14.2 years. Findings revealed mean AL to be 23.2±1.0 mm which was greater in males than females. The longest mean AL in males was seen among age group 51 and 60 years and that for females was seen in age group 41 and 50 years after which in both gender there was noticed to be a decline in mean axial lengths. There was no statistically significant relationship between age and axial length. Axial length was found to be longer in subjects with higher level of education and this pattern was statistically significant. Conclusion: AL was significantly longer in males and has a positive relationship with the level of education of the study population. The longest mean AL in males was seen among age group 51 and 60 years and that for females was seen in age group 41 and 50 years after which in both gender there was noticed to be a decline in mean axial lengths.

Aim: To determine the anthropometric parameters affecting ocular axial length in Niger Delta region of Nigeria. Methods: This was a community based descriptive study carried out in Port Harcourt City LGA, Nigeria using a multistage random sampling technique. Inclusion criteria were Visual Acuity > 6/18, age greater than 18 years and no history of past ocular surgeries or trauma. Socio demographic data was obtained through an interviewer based proforma and included age, sex and tribe. Anthropometric parameters were measured using a standard height and weight automated scale (SECA 769,220). Ocular examinations done included visual acuity, applanation tonometry, and ophthalmoscopy. 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), and P value was set at ≤ .05. Results: The study was made up of two hundred and twelve (212) males (45.5%) and two hundred and fifty four (254) females (54.5%) with M: F ratio of 1:1.2 giving a total of four hundred and sixty six (466) subjects. The age range was 18-92 years and mean age of the subjects studied 43.0±14.2 years. Findings revealed mean AL, Height and Weight to be (23.2±1.0 mm), (162.5±9 cm) and (70.5±14.8 kg) respectively. The mean AL was greater in males than females. There was a statistically significant relationship between height and AL in both gender with AL increasing by 0.035mm (p=0.001, r=0.261) with one centimeter change in height in males and 0.025 mm (p=0.001, r=0.2680) in females. There was also a statistically significant (0.009 mm) increase in AL per one kilogram change in weight in females (p=0.0001, r=0.188). Conclusion: This study noted that there are significant relationships between AL and height and weight respectively. This could add to the data bank for AL in the country and form a basis for identifying deviations from the normal, for further research.

Aim: To determine the correlation between Ocular axial length (AL) and body mass index (BMI) in a black population. Methods: This was a descriptive cross sectional study carried out in Port Harcourt City LGA, Nigeria. Subjects were selected using multistage random sampling with inclusion criteria of Visual Acuity > 6/18, age greater than 18 years with no history of past ocular surgeries or trauma. Socio demographic data was obtained through an interviewer based structured proforma. Data obtained included age, sex, tribe, occupation and level of education. Weight, height and Body Mass Index (BMI) were measured using a standard height and weight automated scale (SECA 769,220). Ocular examinations done included visual acuity, applanation tonometry and ophthalmoscopy. 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), and p value was set at ≤ 0.05. Results: Four hundred and sixty six (466) subjects participated in the study made up of two hundred and twelve (212) males (45.5%) and two hundred and fifty four (254) females (54.5%) with M: F ratio of 1:1.2. The age range was 18-92 years and mean age of the subjects studied 43.0±14.2 years. Findings revealed mean AL, Body Mass Index, Height and Weight to be (23.2±1.0 mm), (26.9±6.2 kg/m2), (162.5±9 cm) and (70.5±14.8 kg) respectively. The mean AL was greater in males than females. There was no statistically significant relationship between age and axial length. There was a statistically significant relationship between height and AL in both gender with AL increasing by 0.035 mm (p=0.001, r=0.261) with one centimeter change in height in males and 0.025 mm (p=0.001, r=0.2680) in females and between AL and level of education (p=0.001). There was also a statistically significant (0.009 mm) increase in AL per one kilogramme change in weight in females (p=0.0001, r=0.188). Males had longer AL than females in all the BMI groups with a statistically significant difference found between the different BMI classes. Conclusion: This study noted that although there is no statistically significant relationship between AL and BMI, there are significant relationships between AL and height and weight respectively. Estimated AL in mm= 16.91 + 0.039 (height in cm).