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Original Research
Change in refraction, corneal power and axial length of the eye secondary to silicone oil tamponade injection after pars plana vitrectomy
Submitted: 20 March 2021 | Published: 28 January 2022
About the author(s)
Abdelaziz M. Elmadina, Department of Optometry, College of Applied Medical Sciences, Qassim University, Buraydah, Saudi ArabiaMustafa Abdu, Department of Optometry, Faculty of Applied Medical Sciences, University of Jeddah, Jeddah, Saudi Arabia; and, Department of Contact Lens, Faculty of Optometry, Al-Neelain University, Khartoum, Sudan
Saif H. Alrasheed, Department of Optometry, College of Applied Medical Sciences, Qassim University, Buraydah, Saudi Arabia; and, Department of Binocular Vision, Faculty of Optometry, Al-Neelain University, Khartoum, Sudan
Nuha M.F. Alrahman, Department of Medical Photography, Faculty of Optometry, Al-Neelain University, Khartoum, Sudan
Akram E. Hamza, Department of Primary Eye Care, Faculty of Optometry, Al-Neelain University, Khartoum, Sudan
Mohammad A. Alobaid, Department of Optometry, College of Applied Medical Sciences, Qassim University, Buraydah, Saudi Arabia
Abstract
Background: Refractive and ocular biometric changes after silicone oil tamponade (SOT) in phakic eyes have been studied thoroughly; however, similar studies amongst Sudanese patients with vitreoretinal conditions were not carried out.
Aim: This study aimed to assess post-operative changes in refraction, corneal power and axial length after pars plana vitrectomy (PPV) with SOT in phakic patients.
Setting: The study was conducted at Sudan Eye Center, Khartoum, Sudan.
Methods: A cross-sectional retrospective hospital-based study was performed at Sudan Eye Center. The study included all phakic patients who underwent PPV with SOT for a variety of vitreoretinal conditions from October 2018 to January 2019. Clinical investigations included uncorrected visual acuity (VA), best-corrected VA, refraction, corneal power and axial length pre- and post-surgery. Differences in these parameters were assessed using a paired sample t-test with a significance level of < 0.05.
Results: Medical records of 59 consecutive patients (59 eyes, 41 men and 18 women) with ages ranging from 22 years to 75 years were studied. The findings revealed a statistically significant hypermetropic change (pre: –0.17 ± 2.44 dioptre [D] and post: +4.43 ± 2.04 D) with a p-value of < 0.001. In terms of axial length, there was a significant increase (pre: 23.61 ± 1.17 mm and post: 23.82 ± 1.27 mm; p < 0.001). However, no significant change was found in corneal power (pre: –43.60 ± 1.96 D and post: 43.63 ± 2.03 D; p = 0.45).
Conclusion: A hypermetropic shift in refraction, longer axial length and non-considerable increase in corneal power were observed amongst Sudanese phakic patients after PPV with instillation of silicone oil.
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