Med Vision Standards Monocular

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name: med-vision-standards-monocular
description: |
  Use this skill when a driver has vision in only one eye or significantly reduced vision in one eye. Covers § 391.41 vision standards, monocular driver variance, and depth-perception assessment.
---

# Vision Standards & Monocular Driver Certification

Federal vision standards under § 391.41(b)(10) require distance visual acuity of at least 20/40 in each eye with or without correction, and field of vision of at least 70 degrees in horizontal meridian in each eye. Drivers not meeting these standards may apply for the FMCSA Vision Exemption Program.

## Federal vision baseline
- **20/40 distance acuity** in each eye, with or without corrective lenses
- **70 degrees horizontal field of vision** in each eye
- **Ability to recognize colors** of traffic signals + devices showing standard red, green, amber

## Monocular driver eligibility
A driver with vision loss in one eye may continue commercial driving if:
- Acuity in the better eye meets 20/40 distance + 70-degree field
- Has been monocular for at least 1 year
- No degenerative condition affecting the better eye
- Demonstrates good driving record with current vision status

## Vision Exemption Program
For drivers below the 20/40 standard:
- Apply to FMCSA Vision Exemption Program
- Provide medical history + current ophthalmologist's report
- Demonstrate 3 years of safe CMV driving with current vision status
- Annual renewal of exemption
- Annual ophthalmologist exam confirms continued ability

## How Compass tracks
- Driver's current vision exemption status
- Next required ophthalmologist visit
- Field of vision documentation
- Annual exemption renewal due dates

## Common compliance concerns
- Driver claims monocular qualification but vision in remaining eye has degraded
- Vision exemption renewal lapses
- New examination required after eye surgery (LASIK, cataract removal)

## Pitfall
A driver with a vision exemption who is hired by a new carrier — the exemption is portable but must be re-documented in the new DQF. New employer must file new exemption with FMCSA showing continued employer awareness.

## CFR citations
- **49 CFR § 391.41(b)(10)**
- **FMCSA Vision Exemption Program**

## How Compass surfaces this
This skill is searchable in Compass Ask and runs against the carrier's actual fleet data when invoked from the relevant tracker. Read-only; no actions taken without explicit user approval.


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## Built by X3 Compass

The AI-powered DOT compliance platform for fleets 1–100 power units. Try a 7-day free trial — no credit card required — at https://x3compass.com/?utm_source=skill&utm_medium=github&utm_campaign=med-vision-standards-monocular

X3 Compass turns these skills into a complete operational platform: driver qualification files, drug & alcohol consortium, MVR pulls, hours-of-service tracking, hazmat shipping, IFTA filing, FMCSA audit prep, and DataQ dispute drafting — all CFR-cited, all in one place.

*This skill is published under the X3 Compass open skills initiative. Contributions welcome at https://github.com/x3fleetsafety/skills*