Snellen Vision Testing
DOT requires 20/40 vision for CDL drivers. Vision screening identifies correctable deficiencies before medical certification appointments.
Vision deficiencies can disqualify CDL drivers and safety-sensitive workers during medical certification. DOT vision standards require 20/40 acuity in each eye (with or without correction), 70-degree peripheral vision, and ability to distinguish traffic signal colors. Workers who fail vision screening during DOT physicals face disqualification until they obtain corrective lenses or specialist clearance.
Diversified provides vision screening before medical certification appointments: Snellen chart visual acuity testing for distance vision, peripheral vision field testing, color vision discrimination screening (Ishihara test), and corrective lens verification ensuring workers meet standards before DOT physical appointments. Pre-certification vision screening identifies correctable deficiencies early, giving workers time to obtain glasses or contacts before their medical exam. For non-DOT positions, vision screening establishes baseline capabilities for safety-sensitive roles (equipment operators, forklift drivers, crane operators).
Key Features
Pre-Certification Vision Screening
Identify correctable vision deficiencies 2-3 weeks before DOT physicals, giving workers time to obtain corrective lenses and prevent disqualification.
Multi-Standard Testing Protocols
Comprehensive screening covering DOT standards, OSHA safety-sensitive requirements, and employer-specific vision criteria.
Integrated Medical Surveillance
Vision screening coordinates with DOT physical scheduling, annual medical surveillance, and corrective lens verification reminders.
Medical & Compliance Requirements
Compliance Requirement
DOT Vision Standards (49 CFR §391.41(b)(10)):
- Distant visual acuity of at least 20/40 in each eye (with or without correction)
- Distant binocular acuity of at least 20/40
- Field of vision of at least 70 degrees in horizontal meridian in each eye
- Ability to recognize colors of traffic signals and devices (red, green, amber)
- Monocular vision (one functional eye) may qualify with medical examiner discretion and adequate peripheral vision
Frequently Asked Questions
Yes. Drivers may use corrective lenses (glasses or contacts) to meet the 20/40 vision requirement. However, drivers must wear their corrective lenses at all times while operating and must carry a spare set of glasses or contacts. The medical certificate will indicate "accompanied by corrective lenses."
Drivers who fail vision screening should obtain corrective lenses or see an eye care specialist before their DOT physical appointment. Diversified coordinates this timing to prevent medical certification delays and driver disqualification. Pre-screening identifies issues 2-3 weeks before scheduled physicals, giving time for correction.
Vision testing is not federally mandated for most non-CDL positions, but employers often require it for safety-sensitive roles like forklift operators, crane operators, heavy equipment operators, and warehouse personnel operating powered industrial trucks. Vision baseline documentation also supports workers' comp and liability defense.
DOT drivers are screened during each medical certification (24 months typically). For non-DOT employees, annual or biennial vision screening is recommended for safety-sensitive positions and workers over age 50 experiencing age-related vision changes.
Related Services
DOT Physical Examinations
CDL drivers must renew medical certificates every 24 months. Schedule at 3,000+ locations nationwide—ideal for OTR drivers who need convenient access anywhere in the country.
Fit for Duty Physical Evaluations
Independent fit-for-duty evaluations help employers make informed return-to-work decisions. Board-certified occupational medicine physicians provide objective assessments matched to job requirements.
Audiogram Testing (Hearing Conservation)
OSHA mandates annual audiograms for workers exposed to 85+ dB noise levels. OSHA hearing conservation testing with baseline and annual audiograms per regulatory requirements.
Identify correctable vision issues before DOT physicals with pre-certification screening.
Contact our occupational health specialists to ensure your workforce meets all medical certification and fitness-for-duty requirements.
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