The Three Types of Eye Care Providers
| Provider | Credentials | What They Do |
| Optometrist (OD) | Doctor of Optometry | Comprehensive eye exams, prescriptions, contact lenses, diagnosis and management of most eye diseases, co-management of surgical cases |
| Ophthalmologist (MD/DO) | Medical doctor specialising in eyes | Everything an optometrist does, plus eye surgery (cataract, LASIK, retinal surgery), complex disease management |
| Optician | Certified technician | Fills prescriptions for glasses and contacts, fits frames, makes lenses. Cannot examine eyes or diagnose conditions |
When to See an Optometrist
An optometrist is the right starting point for the vast majority of eye care needs. This includes:- Routine comprehensive eye exams for adults and children
- Updating a glasses or contact lens prescription
- Evaluation of symptoms like blurry vision, eye strain, or light sensitivity
- Diagnosis and management of conditions such as dry eye, glaucoma, and diabetic eye disease
- Co-management of LASIK or cataract surgery (pre- and post-operative care)
- Eye infections such as conjunctivitis (pink eye)
- Emergency evaluation of sudden vision changes, eye pain, or injury
When to See an Ophthalmologist
You typically need an ophthalmologist when surgery is required or when a condition is complex enough to need specialist-level medical management. Common reasons include:- Cataract surgery
- LASIK or other refractive surgery
- Retinal conditions such as retinal detachment, macular degeneration requiring injections, or diabetic retinopathy requiring laser treatment
- Glaucoma that is not controlled with medication
- Complex corneal conditions
What an Optician Does
An optician fills the prescription that your optometrist or ophthalmologist has written. They help you select frames, take measurements, fit lenses, and adjust glasses for comfort. They are not trained to examine eyes or diagnose conditions, and they cannot write or alter a prescription. If you have a valid prescription, you can take it to any optician or optical retailer to have glasses made. You do not need to return to the practice that issued the prescription, though it is convenient to do so.Understanding Vision Insurance in New England
Navigating insurance is one of the more practical challenges of accessing eye care. Here is a general guide to common insurance and how it typically applies:MassHealth
MassHealth (Massachusetts Medicaid) covers basic eye care services for eligible members, including comprehensive eye exams and eyeglasses in some circumstances. Coverage details vary by plan type. Eyes On Group accepts MassHealth. If you are unsure about your coverage, calling the practice before your visit is the most reliable way to confirm.Davis Vision and VSP
Davis Vision and VSP (Vision Service Plan) are two of the most common managed vision care plans in the US. Both cover annual or biennial comprehensive eye exams and provide allowances toward glasses or contact lenses. Many optometry practices, including Eyes On Group, accept these plans.UnitedHealthcare Vision
UnitedHealthcare offers vision benefits as a standalone plan or as part of a broader health insurance package. Coverage typically includes an annual exam and an allowance for frames, lenses, or contact lenses. To confirm whether Eyes On Group accepts your specific plan, contact any of our four locations directly. Insurance acceptance can change, and verifying before your appointment is always the right step.Can an Optometrist See Floaters?
Yes. An optometrist can detect floaters and, more importantly, can assess whether floaters represent a benign age-related change or a sign of a more serious condition such as a posterior vitreous detachment or retinal tear. If you have noticed new floaters, particularly if they appeared suddenly or are accompanied by flashes of light, a comprehensive eye exam should be your first call, not a wait-and-see approach.Can an Optometrist Diagnose Cataracts?
Yes. Optometrists diagnose cataracts as part of a standard comprehensive eye exam using a slit lamp and other instruments. They can monitor cataract progression over time and refer to an ophthalmologist when surgery becomes the appropriate next step. Having a cataract does not mean you automatically need surgery; your optometrist will track when the visual impact reaches the threshold where surgery is warranted.Do Optometrists Perform Surgery?
Generally no, with some exceptions by state. In Massachusetts and Rhode Island, optometrists do not perform surgery. Surgical procedures, including LASIK, cataract surgery, and retinal surgery, are performed by ophthalmologists. Optometrists co-manage surgical cases, meaning they handle the pre-operative evaluation and post-operative follow-up while the ophthalmologist performs the procedure itself.Frequently Asked Questions
What is the difference between an optometrist and an ophthalmologist?
An optometrist (OD) is a primary eye care provider who examines eyes, prescribes lenses, and manages most eye conditions. An ophthalmologist (MD or DO) is a medical doctor who can do everything an optometrist does and also perform eye surgery. Most people see an optometrist for routine care and are referred to an ophthalmologist when surgery is needed.
Who should I see for blurry vision?
Start with an optometrist. They can diagnose the cause of blurry vision, update your prescription if needed, and refer you to an ophthalmologist if a surgical or specialist-level condition is found.
Can an optometrist detect a brain tumor?
An eye exam can reveal signs that may indicate increased intracranial pressure or other neurological changes, including optic nerve swelling, which can be a sign of conditions affecting the brain. Optometrists who notice these signs refer patients for appropriate neurological evaluation. A comprehensive eye exam is not a brain scan, but it can detect ocular manifestations of some neurological conditions.
Where can I get my glasses prescription filled?
Any licensed optician or optical retailer can fill a valid glasses prescription. You can take your prescription to an in-store optical department, an independent optician, or an online retailer. The prescription does not have to be filled at the practice where the exam was performed.
Who accepts MassHealth for eyeglasses?
Eyes On Group accepts MassHealth. Coverage varies by plan type, so it is worth confirming the specifics of your plan and the services covered when you book your appointment.
Can an optometrist see eye floaters?
Yes. An optometrist examines the vitreous and retina as part of a dilated eye exam and can detect floaters as well as assess their clinical significance. Sudden onset of floaters, particularly with flashes of light, warrants a prompt eye examination.
Finding the Right Eye Care for Your Needs
For most people, most of the time, an optometrist is the right provider. They handle the full range of primary eye care, from routine prescriptions to disease monitoring to urgent evaluations. They refer when specialist surgical care is needed.
Eyes On Group optometrists see patients across Worcester, Randolph, Lincoln, and Cranston. We accept MassHealth, Davis Vision, VSP, UnitedHealthcare Vision, and other major plans. Book your appointment online.