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Corneal Topographic Indices of Scheimpflug Camera in Type 2 Diabetic and Non-Diabetic Elderly Populations Publisher Pubmed



Hashemi A1 ; Khabazkhoob M2 ; Narooei F3 ; Mortazavi A4 ; Hashemi H3
Authors
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Authors Affiliations
  1. 1. Noor Ophthalmology Research Center, Noor Eye Hospital, Tehran, Iran
  2. 2. Department of Basic Sciences, School of Nursing and Midwifery, Shahid Beheshti University of Medical Sciences, Tehran, Iran
  3. 3. Noor Research Center for Ophthalmic Epidemiology, Noor Eye Hospital, Tehran, Iran
  4. 4. Department of Neurosurgery, Sina Hospital, Tehran University of Medical Sciences, Tehran, Iran

Source: BMC Ophthalmology Published:2023


Abstract

Purpose: The present study was conducted to determine the corneal topographic indices of Scheimpflug camera in type 2 diabetes patients without diabetic retinopathy (DR), DR and non-diabetic elderly populations. Methods: A total of 1105 participants were selected using random cluster sampling from Tehran, Iran and categorized into three groups including type 2 diabetes patients without diabetic retinopathy (DR), DR and non-diabetic. The diabetic group had HbA1c levels ≥ 6.4% with no other systemic problems. The non-diabetic participants had normal eye findings and no systemic diseases. The pachymetric progression index (PPI) values were measured using the Pentacam AXL. Results: A total of 1105 participants including 429 diabetes patients (38.46% male) and 676 non-diabetic (38.76% male) subjects entered the study. Only PPIavg and PPImax were higher in the diabetics versus non-diabetics (P = 0.019 and 0.010, respectively). There was a significant difference in PPImax between the three groups (P = 0.036). There were significant differences only in index of vertical asymmetry (IVA), central keratoconus index (CKI), PPI average, and PPI max between different stages of diabetic retinopathy (DR) (P = 0.045, 0.005, 0.002, and 0.004, respectively). There was a significant difference in index of Surface Variance (ISV), index of vertical asymmetry (IVA), PPIavg, and PPImax between diabetes patients with and without DR (P = 0.016, 0.022, < 0.001, and < 0.001, respectively). Conclusion: According to the results, diabetes and DR change several topographic indices. In addition, the HbA1c level may affect pachymetric progression index max. Therefore, special attention should be paid to these patients for different treatment strategies. © 2023, BioMed Central Ltd., part of Springer Nature.
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