Medical insurance or vision insurance: which one pays for scleral lenses?

Two kinds of plan, two different jobs

Medical insurance pays for diagnosing and treating illness and injury. For your eyes, that means visits for conditions like keratoconus, corneal transplants, dry eye disease, or graft-versus-host disease, and the tests used to diagnose and monitor them. HealthCare.gov defines medically necessary care as services or supplies needed to diagnose or treat an illness, injury, condition, disease, or its symptoms that meet accepted standards of medicine.^[4]

Vision insurance pays for routine eye care: a yearly eye exam and an allowance toward glasses or contact lenses. Many vision plans also include a separate benefit for contact lenses that are needed for a medical reason.

Scleral lenses sit between the two. They are a medical device that also corrects vision, so plans often split them up.

How a medical plan may treat scleral lenses

One large insurer’s published policy shows how this works in practice. It’s an example, not a rule for every plan.

• It says that many of its medical plans exclude contact lenses and eyeglasses, and under those plans contact lenses are covered only for a narrow set of therapeutic uses.^[1]
• For keratoconus and other corneal conditions that cause irregular astigmatism, it treats the evaluation as medically necessary, including the examination, corneal topography, and the fitting of contact or scleral lenses.^[1]
• But under medical plans that exclude contact lenses, it does not cover the lenses themselves for that purpose. It says they are covered only under the member’s vision care plan.^[1]
• Scleral lenses used as a liquid bandage for severe ocular surface disease, such as Stevens-Johnson syndrome, neurotrophic corneas, or severe dry eye from Sjögren’s or graft-versus-host disease, are treated differently: the same policy considers them medically necessary prosthetics, covered even under plans that exclude contact lenses, because they aren’t primarily for correcting vision.^[1]

So with this kind of plan, someone with keratoconus might have the medical visits covered and need a vision plan for the lenses, while someone with severe ocular surface disease might have the lenses covered by the medical plan.

Medicare works differently again. Original Medicare usually doesn’t cover contact lenses, with narrow exceptions.^[5] See the Medicare guide for details.

How a vision plan may treat scleral lenses

Many vision plans have two contact lens benefits:

• Elective contacts: you choose contacts instead of glasses. The plan pays a fixed allowance.
• Medically necessary (or “visually required”) contacts: contacts needed because of a qualifying condition. These are often paid more generously.

For example, one employer’s 2025 VSP plan chart lists elective contacts with a fixed allowance and “necessary contacts” as covered in full at VSP providers, with a copay of up to $60 on the contact lens exam.^[3] That is one employer’s plan; yours may differ.

Vision plans set criteria for the medically necessary benefit. Davis Vision’s published criteria, for example, list keratoconus, high prescriptions, a large difference between the two eyes, aphakia, aniridia, and irregular astigmatism, each with specific requirements, and they state that meeting the criteria doesn’t guarantee approval.^[2]

Why the split matters to you

• You may need to use both plans. The medical plan for exams and the fitting, the vision plan for the lenses.
• Network status can differ. A practice can be in network with your medical plan and not your vision plan, or the reverse.
• Each plan has its own rules. One may need prior authorization; the other may not.
• The wrong benefit can be applied. A claim processed under the elective contact lens benefit may pay far less than the medically necessary benefit would.

Questions to ask your medical plan

1. Does my plan exclude contact lenses? Are there exceptions for medical conditions?
2. Are the exams and contact lens fitting covered for my diagnosis?
3. Are scleral lenses covered if they’re used to treat ocular surface disease?
4. Do I need prior authorization for the fitting or the lenses?
5. Is my fitter in network? If not, do I have out-of-network benefits?

Questions to ask your vision plan

1. Does my plan have a medically necessary or visually required contact lens benefit?
2. Which diagnoses qualify, and what documentation does the fitter need to send?
3. How much does that benefit pay, in and out of network?
4. Does it need prior approval before the lenses are ordered?
5. How often can I use it, and does it cover replacement lenses?

Write down the date, the name of the person you spoke with, and a reference number for each call.