Part I
Part I
Build your foundation with anatomy, optics, and disease-focused practice.
Explore Part INBEO Navigator™
Train your clinical reasoning.
Game-based preparation for the NBEO.
Build confidence across Parts I, II, and III with structured practice, coach-voice explanations, and clinical decision-making.
The Navigator platform
One platform. Three NBEO exams.
Part II
Part II
Practice clinical encounters that sharpen diagnosis, management, and safety.
Explore Part IIPart III
Part III
Prepare for TMOD stations with rubric-based feedback and focused repetition.
Explore Part IIIPlatform Preview
See how Navigator thinks.
NBEO Navigator™ · Part I · Ocular Anatomy · Level 1
Mission Briefing
“A 34-year-old presents with acute onset of monocular diplopia. Slit lamp reveals a crystalline lens subluxation. Which zonular fibers are most likely compromised?”
Anterior zonular fibers
Posterior zonular fibers
✓Equatorial zonular fibers
Vitreozonular fibers
Coach Voice
“Equatorial zonular fibers are the primary suspensory ligaments of the crystalline lens. Disruption — as seen in Marfan syndrome or trauma — leads to lens subluxation or dislocation.”
Learn Mode90s remaining
Question
“Which layer of the cornea is responsible for the majority of its refractive power?”
Your answerBowman's layer ✗
Correct answerAnterior stroma ✓
Coach Voice explanation
“The anterior stroma contributes approximately 90% of corneal thickness and, through its precise lamellar arrangement, accounts for the majority of the cornea's refractive contribution. Bowman's layer, while important for structural integrity, is only ~12μm thick and plays a minimal role in refraction. This distinction matters clinically when evaluating post-refractive surgery outcomes.”
Built for better clinical decisions.
Reasoning first
Practice the decisions that connect knowledge to patient care.
Focused feedback
Understand why each answer matters with concise coach-voice guidance.
Confidence under pressure
Train with targeted feedback and purposeful repetition.
Part of the myODce learning ecosystem
Navigator complements the resources and professional development tools that support emerging optometrists.
Ready when you are.
Choose the plan that supports your path through the NBEO.
Part I
$199
Part II
$149
Part III
$99
Complete access
$399