MyopiaProgression.com · Teaching guide

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Four measurements answer different questions

DFOCUS

Refraction · diopters

Assesses: Optical focusing under the recorded conditions

Does not establish alone: The exact amount of axial growth

mmLENGTH

Axial length · millimeters

Assesses: Eye length and its change with repeatable measurement

Does not establish alone: Lens fit, comfort or every cause of blur

VATASK

Visual acuity · recorded method

Assesses: Performance on a specified visual task

Does not establish alone: Stable eye growth or absence of ocular disease

HEALTHEXAM

Ocular health · clinical findings

Assesses: Structures, symptoms and disease concerns

Does not establish alone: The entire treatment-response story

A conceptual measurement map. Results must be interpreted together; no normal-growth or treatment-escalation threshold is assigned. Sources: [1] ·

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