Poi Sensei's Eye Dojo

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Ophthalmic Examinations

Poi Sensei

Hess chart interpretation: which muscle is weak, and is it really a palsy? Two Hess charts side by side with a smaller paretic field and an overacting yoke muscle

Ophthalmic Examinations

Hess Chart Interpretation: Which Muscle Is Weak, and Is It Really a Palsy?

September 16, 2026 Poi Sensei

EOG test: the Arden ratio and what it tells you. The eye and RPE, the dark trough and light peak on the Arden curve, and icons for RPE, DT, LP and the ratio

Ophthalmic Examinations

EOG Test: The Arden Ratio and What It Tells You

September 7, 2026 Poi Sensei

VEP test: how to read a visual evoked potential. A checkerboard stimulus, the visual pathway and the N75-P100-N145 waveform

Ophthalmic Examinations

VEP Test: How to Read a Visual Evoked Potential

September 6, 2026 Poi Sensei

How to read fluorescein angiography: a pattern-based approach. Three fluorescein angiograms showing hyperfluorescence, hypofluorescence and pattern recognition

Ophthalmic Examinations

How to Read Fluorescein Angiography: A Pattern-Based Approach

August 28, 2026 Poi Sensei

CFF test: principles and how to read the result. A flicker stimulus, the critical flicker fusion frequency and a normal-value chart by age

Ophthalmic Examinations

CFF Test: Principles and How to Read the Result

April 17, 2025 Poi Sensei

How to read and interpret ERG: a practical guide to electroretinography, with the a-wave, b-wave and oscillatory potentials matched to the retinal layers

Ophthalmic Examinations

ERG in Ophthalmology: Normal Waves and How to Read Them

April 10, 2025 Poi Sensei