VisionAlignBinocular Vision Assessment

A comprehensive clinical tool for evaluating and diagnosing binocular vision and accommodative disorders, with evidence-based treatment recommendations.

Complete Assessment Workflow

CISS + Symptom Screen

Validated 15-item CISS with age-band cut-points, additional symptom domains, and full clinical history

Comprehensive Clinical Battery

Refraction/VA, NPC (trials + fatigue + red-lens), cover test with vertical, vergence ranges, Modified Thorington AC/A, accommodative battery, stereopsis & sensory fusion

24-Condition Diagnostic Engine

Duane-White / Scheiman-Wick framework expanded: accommodative, vergence (sorted by AC/A), vertical, ocular motor, and secondary/mimic conditions — with REFER flags for medical workup

Treatment Plans & Progress

CITT-ART-based progress markers (NPC, PFV, vergence facility) with patient education

Diagnostic Capabilities

Our diagnostic engine evaluates clinical findings against established norms to identify common binocular vision and accommodative disorders.

Accommodative Disorders

Accommodative Insufficiency

Ill-Sustained Accommodation (Early/Mild AI)

Accommodative Excess (Functional Spasm)

Accommodative Infacility

Paralysis of Accommodation (REFER)

Spasm of the Near Reflex (REFER)

Vergence — Low AC/A

Convergence Insufficiency (CI)

Divergence Insufficiency (DI)

Divergence Paralysis (REFER)

Vergence — High AC/A

Convergence Excess (CE)

Divergence Excess (DE)

Vergence — Normal AC/A

Basic Exophoria

Basic Esophoria

Fusional Vergence Dysfunction

Vergence Infacility

Vertical & Ocular Motor

Vertical Heterophoria

Saccadic Dysfunction

Pursuit Dysfunction & Fixation Instability

Secondary / Mimics / Overlap

Pseudo-CI (Secondary to AI)

Pseudo-CE (Secondary to AI)

Combined CI + AI

Post-Concussion Dysfunction

Aniseikonia & Anisophoria

Uncorrected Refractive Error (Universal Mimic)

Normative Reference Values

NPC Break / Recovery≤5 / ≤7 cm

Phoria (Distance / Near)1 eso-3 exo / 0-6 exo

Near BO (PFV)17/21/11

Near BI (NFV)13/21/13

NRA / PRA+2.00 / -2.37 D

AC/A Ratio4:1 (3-5:1)

MAF / BAF (±2.00)11 / 8 cpm

Vergence Facility15 cpm ± 3

Vertical Vergence3–4Δ supra/infra

Stereo (Randot)20–40″

Ready to Assess Your Patient?

Start with the validated CISS symptom survey, enter clinical findings, and receive evidence-based diagnostic recommendations.

Built on the Duane-White / Scheiman-Wick Diagnostic Summary Chart (Expanded & Annotated) — 24 conditions across accommodative, vergence, vertical, ocular motor, and secondary/mimic categories. Expected values from Morgan-based norms (CITT criteria where noted). Hofstetter amplitude formula. For professional use only — a study and clinical-reasoning aid, not a substitute for clinical judgment.