In Humphrey automated perimetry using the 24-2 testing pattern, the mean deviation (MD) of -10 dB in a glaucoma patient most accurately reflects:
- A Moderate glaucomatous visual field loss with relative central preservation ✓
- B End-stage glaucoma with only central island remaining
- C Early glaucoma with paracentral scotoma only
- D Normal tension glaucoma with temporal field defect
Correct answer: A. Moderate glaucomatous visual field loss with relative central preservation
Explanation
Mean deviation (MD) measures the overall deviation of the entire visual field from age-matched normative values. An MD of -10 dB corresponds to moderate glaucomatous damage (mild: 0 to -6 dB; moderate: -6 to -12 dB; severe: worse than -12 dB) with significant loss but not end-stage. End-stage glaucoma typically has MD worse than -20 dB with only a small central island. Early glaucoma usually has MD between 0 and -6 dB.
Reference: Khurana Comprehensive Ophthalmology, 7th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.