Benefits of A-Scan Ultrasonography

Ocular ultrasonography is a non-invasive imaging technique that uses high-frequency sound waves to evaluate the eye and orbit. It is especially useful when direct visualization is limited due to opaque media such as dense cataract or vitreous hemorrhage. The two main modalities are A-Scan (Amplitude Scan) and B-Scan (Brightness Scan).

• Accurate Axial Length Measurement – crucial for precise intraocular lens (IOL) power calculation in cataract surgery.
• Non-invasive and Quick – can be performed easily in outpatient settings.
• Essential in Refractive Errors – helps in evaluating extreme myopia and hyperopia.
• Useful in Biometry – provides measurements of anterior chamber depth, lens thickness, and vitreous length.
• Detection of Intraocular Masses – aids in differentiating solid vs. cystic lesions.