Florida medical window tint exemption

Drivers with a documented medical or physical condition that requires additional protection from sunlight, as attested by a licensed physician, optometrist, or osteopathic physician.

• Completed FLHSMV Form 83390 signed by the applicant.
• Physician, optometrist, or osteopathic-physician certification of medical necessity.
• Submission to the Florida Department of Highway Safety and Motor Vehicles.
• Exemption certificate must be carried in the vehicle at all times.

Open the official form →

Renewal / expiration: The Florida Medical Exemption certificate is typically valid as long as the underlying medical condition exists; certificates must be retained in the vehicle.

Editor’s note

Applicants are solely responsible for complying with the most current FLHSMV instructions. Requirements can be revised by the agency.

A medical window tint exemption is a narrow, condition-specific authorization that lets a driver install darker aftermarket window film than the state’s general Visible Light Transmission (VLT) minimum would normally allow. It does not make the vehicle invisible to enforcement — officers can still stop the vehicle, meter the windows, and ask for documentation. It simply means that, when asked, the driver can present a physician-signed statement (and in some states an agency-issued permit or sticker) that shifts the question from “is this illegal?” to “does this driver have a valid medical basis for an exception?”

Exemptions exist because a subset of the population has medical conditions where prolonged exposure to visible light, ultraviolet radiation, or infrared heat through vehicle glass causes measurable harm. These conditions are uncommon but well-documented in peer-reviewed medicine. Without a way to drive with reduced light exposure, affected individuals would face restricted mobility and increased disease burden. Every U.S. state has had to decide how to balance traffic-safety concerns about driver visibility with federal disability accommodation law and the medical reality of these conditions.

The scope of what an exemption allows is important to understand up front:

• It typically relaxes the VLT minimum on front side windows only. Back-window rules are already lenient in most states and usually do not need an exemption.
• It does not automatically permit tint on the windshield below the AS-1 line. Windshield film is governed by FMVSS 205 and separate state rules that almost never yield to a medical exemption.
• It does not relax reflectivity caps. Metallic and mirror-finish films are usually still prohibited.
• It is state-specific. An exemption issued in Florida is valid in Florida; it carries no formal reciprocity to other states, though many officers will exercise discretion when they see documentation from any state.

The conditions below are frequently cited in physician certifications for medical tint exemptions. This list is educational — not a diagnosis and not a guarantee that any specific patient will qualify under Florida criteria. A licensed physician must evaluate the individual case and document medical necessity.

While each state has its own form and workflow, the underlying steps are similar almost everywhere. Use these as a checklist in addition to the official Florida application form.

1. Schedule an evaluation with a licensed physician. Most states accept an MD, DO, or in some cases a licensed optometrist. The physician must hold an active license in Florida (or a reciprocal state, in jurisdictions that accept out-of-state certifications).
2. Discuss the clinical basis. Bring prior records if you already have a diagnosis. Your physician may order photosensitivity testing or review existing dermatology / rheumatology notes. The goal is to establish medical necessity — not to argue for a cosmetic preference.
3. Obtain the signed certification or prescription. The physician completes and signs the state form (if one exists) or writes a letter on office letterhead stating the diagnosis, the necessity of reduced visible/UV/IR light exposure while driving, the recommended VLT percentage, and the expected duration.
4. Submit to the issuing agency. In Florida, submission typically goes to the DMV, Department of Transportation, or State Patrol — see the references section below for the correct office.
5. Wait for the permit, sticker, or acknowledgment. Processing time varies by state. Some states issue a window sticker; some issue a paper permit; some states (like California) simply require the physician letter to live in the glovebox with no further state paperwork.
6. Install the tint at the authorized VLT. Use a certified installer who understands medical-exemption installs. Keep the installer’s receipt showing the exact film and VLT.
7. Keep documentation in the vehicle at all times. A citation can happen any time, but is usually resolved roadside if you can produce a valid physician statement and (where applicable) state-issued sticker or permit.

An officer who observes visibly dark tint generally has reasonable suspicion to conduct an equipment stop in most states. The interaction usually follows a predictable sequence:

• License, registration, proof of insurance — standard request.
• Window meter reading — the officer may apply a calibrated VLT meter to each window that appears tinted and record the reading.
• Documentation request — at this point, present your physician’s letter or state-issued exemption sticker / permit. Remain calm and non-confrontational; the document is what resolves the stop.
• Verification — the officer may call dispatch or the issuing agency to verify the exemption. In states with electronic registration of exemptions, this is essentially instant.
• Resolution — in a valid-exemption case, the stop typically ends with a warning or no citation. Officers occasionally write a citation anyway and leave the judge to dismiss it on documentation; this is rare but not unheard of.

Pro tip: carry a physical copy of the physician certification in the glovebox and a photo of it on your phone in case the physical copy is missing or damaged. If your exemption came with an official window sticker, place it where an officer can see it from the driver’s side (check state-specific placement instructions).

• It does not grant unlimited darkness. States typically specify a minimum allowable VLT even with an exemption (often 20–35% on front side windows, sometimes lower for specific diagnoses like XP).
• It is not a universal defense. If the film is also illegal for reflectivity or color, the exemption does not cure those violations. Metallic and colored films can still trigger citations even with a valid medical exemption.
• It does not transfer to rental or borrowed vehicles. Most exemptions are tied to a specific VIN or owner. If you drive a rental car, the exemption does not protect the rental’s windows.
• It does not override federal laws. If you drive onto federal property (national park, military base, post office), federal officers enforce the applicable federal rules. State exemptions are still typically respected, but not guaranteed.
• It does not remove the need for installer competence. Film certification, ASTM compliance, and workmanship still apply. Always use a certified installer.

Denials happen. The most common reasons, in roughly decreasing order of frequency:

• Missing or illegible physician signature / license number. The number-one cause of rejection. Ensure the physician prints and signs the form, and includes their state license number.
• Diagnosis language too vague. “Sensitivity to light” is usually insufficient; a specific diagnosis code (ICD-10) plus a clinical explanation of how light exposure worsens the condition is much stronger.
• Physician not licensed in the state. Some states require a locally licensed physician. Telemedicine evaluations from out-of-state providers can fail for this reason.
• Requested VLT below the state floor. Even with an exemption, most states have an absolute minimum (often 20% VLT). Requests for 5% will be reduced or denied.
• Form is outdated. States update their forms periodically. Always download the form immediately before your physician visit, not months in advance.
• Missing supporting documentation. Some states require dermatology / rheumatology / ophthalmology notes in addition to the form.

If you are denied, request the written reason, address the specific defect, and resubmit. In most cases the denial is procedural, not substantive. If the denial is substantive (the agency disputes medical necessity), you may have an administrative appeal right — check the denial letter for the appeal deadline, which is often short (30–60 days).

Medical tint exemptions are not like driver’s licenses: there is no federal reciprocity framework. Your Florida exemption is valid in Florida; anywhere else, it exists at the discretion of the officer you encounter.

In practice:

• For short trips (vacation, road trip, visiting family), most officers will accept a clearly-documented out-of-state exemption and resolve the stop with a warning. This is not guaranteed.
• For long-term moves, apply for a new exemption in your destination state as part of your DMV transfer. Do not rely on the old state’s paperwork.
• For regular cross-border commuters (for example, between Florida and a neighboring state for work), apply for exemptions in both states. The cost is usually trivial compared to the aggregate ticket risk over a year of commuting.
• For Canadian or Mexican border crossings, neither country honors U.S. state medical exemptions. Canadian provinces have their own (typically stricter) rules and separate application processes.

If your condition is real but you do not qualify for a formal exemption — or you prefer not to pursue one — several options can meaningfully reduce UV and heat exposure without violating tint law:

• UV-rejecting clear ceramic window film. Products at 70–90% VLT can block 99%+ of UVA and UVB while remaining legal on all windows in most states. These films are invisible to meters calibrated for dark tint and typically pass inspection.
• Interior sunshades for parked vehicles reduce cabin temperature and UV loading. No legal concern.
• UV-protective driving gloves and arm sleeves (UPF 50+) reduce direct exposure to arms and hands, which receive the most UV during daytime driving.
• Wraparound polarized sunglasses reduce photophobia meaningfully. Prescription options are widely available.
• Daily-use sunscreen (SPF 30+, broad-spectrum) on any exposed skin remains the baseline standard of care for photosensitive conditions regardless of window tint.

Consult your treating physician for a care plan that combines these approaches with any exemption-based film installation.