Refractive errors and ocular biometry components in thalassemia major patients.

Area of Science:

• Ophthalmology
• Genetics
• Pediatrics

Background:

• Thalassemia major is a genetic blood disorder impacting multiple organs.
• Ocular biometric and refractive characteristics in thalassemia major are not fully understood.
• Understanding these characteristics can aid in managing potential vision complications.

Purpose of the Study:

• To compare biometric and refractive features between thalassemia major patients and healthy controls.
• To investigate the relationship between ocular components and refractive errors in this population.

Main Methods:

• Cross-sectional study involving 54 thalassemia major patients and 54 age/sex-matched controls.
• Measurements included refractive errors, corneal curvature, and ocular components using autokeratorefractometry and A-scan ultrasonography.

Main Results:

• Thalassemia patients had significantly shorter axial length (22.89 ± 0.70 mm) versus controls (23.37 ± 0.91 mm).
• Corneal curvature was significantly steeper in thalassemia patients (R1: 7.77 ± 0.24) compared to controls (7.85 ± 0.28).
• Despite differences in axial length and corneal steepness, mean spherical equivalent showed no significant difference between groups.

Conclusions:

• Thalassemia major is associated with reduced axial length and increased corneal steepness.
• These ocular changes may compensate for each other, maintaining a similar overall refractive error.
• Further research is needed to explore the long-term visual implications in thalassemia major.