Anterior Chamber Angle Shaffer Grading

Grade anterior chamber angle by gonioscopy using Shaffer system: Grade 4 (wide open, 35-45°), Grade 3 (30°, closure improbable), Grade 2 (20°, possible closure), Grade 1-0 (closure likely/closed).

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Height
Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Grade anterior chamber angle by gonioscopy using Shaffer system: Grade 4 (wide open, 35-45°), Grade 3 (30°, closure improbable), Grade 2 (20°, possible closure), Grade 1-0 (closure likely/closed)

Each component has a specific meaning:

  • Shaffer system: Grade 4 (wide open — The shaffer system: grade 4 (wide open recorded for the scenario being assessed.
  • 35-45°) — The 35-45°) recorded for the scenario being assessed.
  • Grade 3 (30° — The grade 3 (30° recorded for the scenario being assessed.
  • Closure improbable) — The closure improbable) recorded for the scenario being assessed.
  • Grade 2 (20° — The grade 2 (20° recorded for the scenario being assessed.
  • Possible closure) — The possible closure) recorded for the scenario being assessed.

Note: Interpret the shaffer angle grade result against the thresholds and context described above.

How to Use

Enter the Shaffer system: Grade 4 (wide open, 35-45°), Grade 3 (30°, closure improbable), Grade 2 (20°, possible closure) for the scenario you are assessing. Grade anterior chamber angle by gonioscopy using Shaffer system: Grade 4 (wide open, 35-45°), Grade 3 (30°, closure improbable), Grade 2 (20°, possible closure), Grade 1-0 (closure likely/closed). Use the shaffer angle grade result to inform your calculation.

Frequently Asked Questions