Differences in Axial Length and Anterior Chamber Depth among Keratoconic, Myopic and Emmetropic Eyes

Doi: 10.36351/pjo.v39i4.1607


  • Mustafa Abdu
  • Yazan Gammoh
  • Hiba Abd Alla




Purpose:  To report variation of the axial length (AL) and anterior chamber depth (ACD) among keratoconic (KC) eyes compared to myopic and emmetropic eyes in an African population sample.

Study Design:  Cross sectional observational.

Place and Duration of Study:  Al-Faisal Eye Hospital at Khartoum state of Sudanfrom January 2022 to September 2022.

Methods:  One-hundred and twenty-four eyes of 62 patients were divided into KC group (n =17, eyes=34), myopic group (n=28, eyes=56), and an age/gender matched emmetropic group (n=17, eyes =34). Central corneal thickness (CCT) was measured using ultrasonic pachymeter, AL, ACD and keratometry readings (K-reading) were recorded for each patient using non-contact partial coherence interferometry with an IOL Master.

Results:  Mean age of the sample population was 22.27± 6.05 (range; 10 – 40 years). KC patients had the highest spherical equivalent of refraction (SER) (-6.19±3.91 dioptres), highest k-reading (48.98±5.68 dioptres) and the thinnest CCT. Myopic participants had a longer AL compared to other refractive error groups (AL=24.99±2.39, p<0.001). KC patients exhibited a larger ACD in comparison to emmetropes and myopes (ACD=3.6?9±0.26, p<0.001). Among all participants, SER exhibited the highest correlation with AL (r=-0.71, p<0.001) followed by a weaker correlation with ACD (r=-0.26, p=0.003). However, among KC patients, SER exhibited a weaker correlation with AL compared to myopes (r=-0.55, p=0.001), and a higher correlation with ACD compared to myopes (r=-0.38, p=0.03).

Conclusion:  ACD and corneal curvature were the most significantly detrimental parameters in KC. KC participants demonstrated a lower correlation between SER and AL and higher correlation between SER and ACD.




How to Cite

Abdu M, Gammoh Y, Abd Alla H. Differences in Axial Length and Anterior Chamber Depth among Keratoconic, Myopic and Emmetropic Eyes: Doi: 10.36351/pjo.v39i4.1607. pak J Ophthalmol [Internet]. 2023 Sep. 29 [cited 2024 Apr. 21];39(4). Available from: https://www.pjo.org.pk/index.php/pjo/article/view/1607



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