Frequently asked questions about eye health
Straight answers on cataracts, LASIK, keratoconus, intraocular lenses, retina and eye exams from Dr. Bolaños, an ophthalmologist near León, Mexico.
Dr. Emmanuel Bolaños Betancourt: ophthalmic surgeon with advanced training in cornea, refractive surgery and cataract microsurgery. I see patients at Hospital Aranda de la Parra Puerto Interior (20 minutes from León) and at Oftalmo-Visión Clínica Oftalmológica in downtown Silao. Board certified by the Consejo Mexicano de Oftalmología since 2013, member 3045. Over 15 years of clinical practice, 292 combined Google reviews with a 4.9 average.
These are the questions I hear most in consultation, on WhatsApp, and the ones patients type into Google and AI assistants about eye health. I answer with the practical information you need to make a decision, not with more confusion than you started with.
If your question isn’t here or you want more detail on a topic, message me on WhatsApp at +52 472 688 2050 or read the specific page: cataract surgery, LASIK / PRK, keratoconus, intraocular lenses, diabetic retinopathy, eye exam.
Diagnosis and symptoms
How do I know if I need to see an ophthalmologist?
If you notice blurry vision that doesn’t improve with your current glasses, pain or pressure in your eyes, flashes of light, new spots or floaters, trouble driving at night, frequent headaches linked to visual effort, or if you have diabetes, high blood pressure, or a family history of glaucoma, it’s worth coming in for an evaluation. A vision screening at the optical shop does not replace an ophthalmologic exam.
What’s the difference between an ophthalmologist, an optometrist and an optician?
An ophthalmologist is a physician and surgeon who specializes in the eyes: they diagnose, prescribe medication and operate. An optometrist checks your prescription and fits glasses but isn’t a physician. An optician assembles and sells glasses from a prescription. If your problem goes beyond a change in prescription, you need an ophthalmologist.
At what age should a child have their first eye exam?
Ideally between 3 and 5 years old, to catch amblyopia (lazy eye) or strabismus early. After that: at ages 8, 13 and 18. Healthy adults should be seen every 2 years until age 40. After 40, every year, especially to rule out glaucoma. If you have diabetes or a family history of glaucoma, annual exams apply regardless of age.
What are the early signs of cataracts?
Vision that gets cloudier over time, or looks like you’re seeing through fogged glass, glare while driving at night, halos around lights, colors that seem less vivid, prescription changes every few months, and trouble reading even with glasses on. These changes are gradual and often get mistaken for normal aging.
How is keratoconus detected?
Keratoconus is detected mainly with corneal topography and corneal tomography, not with a standard vision test. If your prescription changes quickly, you have high or irregular astigmatism, you rub your eyes a lot, or you were already told you’re not a LASIK candidate, keratoconus needs to be ruled out. The earliest stage, called forme fruste keratoconus, is almost never visible without these studies.
Laser surgery: LASIK and PRK
How much does LASIK cost in León, Mexico?
LASIK costs MXN 25,000 for both eyes (price as of October 2026). I perform it at Hospital Aranda de la Parra in León with the TENEO laser. First comes the evaluation, MXN 900, which confirms whether your cornea is right for LASIK; if PRK or another technique suits you better, I’ll give you that cost with your test results.
At what age can I get LASIK?
Ideally starting at age 21, with a stable prescription for at least 1 to 2 years. Before that age, your prescription can still change and surgery won’t deliver a lasting result. The upper limit depends on the state of your natural lens: starting around age 45 to 50, an intraocular lens sometimes makes more sense than LASIK, because presbyopia is already setting in.
How long does LASIK recovery take?
Visual recovery with LASIK takes 24 to 48 hours for most patients. You can drive, work and go back to normal activities the next day. Full stabilization takes about 3 months. With PRK, recovery is slower: several days of discomfort, and vision settles over 2 to 4 weeks.
Is LASIK permanent?
The change to the cornea is permanent, but the eye keeps aging. After age 40 to 45, you’ll likely need reading glasses (presbyopia), even if your distance vision stays sharp without correction. The surgery doesn’t stop the natural lens from aging, since that’s a different structure from the cornea.
What are the real risks of laser eye surgery?
Serious risks are uncommon but real: temporary or chronic dry eye, halos and glare at night, over or under correction that needs a touch up, corneal ectasia (weakening if an unsuitable case gets operated on), and infection. The best way to minimize risk is choosing a surgeon who runs complete studies beforehand and is willing to tell you no if your cornea isn’t a good candidate.
Cataracts and intraocular lenses
Do you have to wait until a cataract is “ripe” to operate?
No. That idea is outdated. Today, surgery is recommended once the cataract starts affecting your daily life: if driving at night feels risky, if glasses no longer improve your vision, if reading or watching television becomes difficult. Waiting for it to “ripen” only makes the surgery longer, more complex and riskier.
How much does cataract surgery with an intraocular lens cost?
The price varies a lot depending on the type of intraocular lens: monofocal, toric, multifocal/trifocal or EDOF. The surgeon’s fee, the lens, the operating room and the preoperative studies are four separate components. A serious surgeon gives you an itemized quote after your evaluation. Be wary of “all inclusive” quotes that don’t specify which lens they use.
Which intraocular lens is the best?
There’s no universal “best.” It depends on your lifestyle, your cornea and your expectations. Monofocal: corrects distance vision, you use glasses for reading. Toric: corrects astigmatism. Multifocal/trifocal: near, far and intermediate vision with minimal dependence on glasses. EDOF: extended range with fewer nighttime visual effects than multifocal. We choose together after reviewing your cornea and understanding which activities matter most to you.
Does cataract surgery hurt?
No. It’s done with anesthetic drops, no needles. You’ll feel pressure and bright light during the procedure, but not pain. Surgery takes 20 to 30 minutes per eye. Most patients notice improved vision starting the next day.
Can I have both eyes done the same day?
Generally that’s not recommended. The standard is to operate one eye, wait 1 to 2 weeks to confirm it’s healing well, then operate the second eye. This lowers the risk if a rare complication occurs and allows adjusting the second eye’s lens if needed.
Keratoconus
Can keratoconus be cured?
Keratoconus can’t be cured, but it can be stabilized so it stops progressing, especially with early treatment. Corneal crosslinking (CXL) is the procedure that halts progression in most cases. When it’s caught early, at the forme fruste stage, crosslinking is usually enough to keep the cornea from advancing to a stage that needs rings or a transplant.
At what age does keratoconus stop progressing?
In most patients, keratoconus progresses until age 30 to 35 and then stabilizes naturally. However, in some patients with a strong family history, severe allergies or chronic eye rubbing, it can continue beyond that. The only way to know if your keratoconus is active is by comparing corneal topographies over time.
Can I get LASIK if I have keratoconus?
No. LASIK is contraindicated in keratoconus because it further weakens a cornea that’s already structurally compromised. That’s why corneal topography before any laser surgery is essential: it rules out forme fruste keratoconus that isn’t causing symptoms yet. What we can do for keratoconus: crosslinking, intracorneal rings, specialty contact lenses or a corneal transplant, depending on the grade.
Does eye rubbing cause keratoconus?
Chronic rubbing isn’t the only cause, but it’s strongly associated with the development and progression of keratoconus. If you have allergies, dry eye or frequent itching and rub your eyes daily, the underlying cause of the itching needs treatment. Stopping the rubbing can matter as much as any corneal treatment.
Diabetes and the retina
How often should I get a dilated eye exam if I have diabetes?
If you were recently diagnosed with type 2 diabetes: an initial exam at diagnosis, then yearly if there’s no retinopathy. If you already have diabetic retinopathy: every 6 months or every 3, depending on the grade. If you have type 1 diabetes: first exam 5 years after diagnosis (or at age 11, whichever comes first), then yearly. Pregnant patients with pre-existing diabetes: every trimester.
Can diabetic retinopathy be reversed?
Early stages can be stabilized with good control of blood sugar, blood pressure and cholesterol. Damage that’s already established at more advanced stages can’t be fully reversed, but it can be slowed to prevent major vision loss. Available treatments include intravitreal injections (anti-VEGF), laser, and, in advanced cases, vitreoretinal surgery.
Dry eye and common symptoms
Why do my eyes always feel tired in front of a screen?
It’s probably digital eye strain combined with dry eye. When we look at a screen, we blink up to 60% less, which dries out the ocular surface. Add poor viewing distance, badly adjusted screen brightness, and a prescription that’s no longer accurate. A full evaluation identifies whether it’s dry eye, an uncorrected refractive error, or both.
Can dry eye be cured?
It depends on the cause. Dry eye linked to screen use or a dry environment is controlled with artificial tears, visual rest breaks and environmental adjustments. Severe dry eye linked to systemic disease needs more intensive medical treatment. What matters is finding the cause and treating it, not just reaching for drops.
Location and logistics
Does Dr. Bolaños see patients from León?
Physically, both of my offices are in the municipality of Silao: Hospital Aranda de la Parra Puerto Interior (my surgical office, with all the advanced diagnostic equipment) and Oftalmo-Visión (general consultation and follow-up). From downtown León it’s about 25 minutes on the highway to Bajío International Airport. I see patients from León every day I have consultation hours.
Which office is right for my case?
For surgeries, high-precision studies (corneal topography, tomography, retinal OCT, pachymetry, aberrometry, biometry) and preoperative evaluations: Hospital Aranda de la Parra Puerto Interior. For general consultations, routine checkups and postoperative follow-up: Oftalmo-Visión. If you’re not sure, send a WhatsApp message describing your reason for the visit and my team will point you to the right one.
Do you see patients from abroad?
Yes. I see patients from the United States, Canada and Latin America. Being minutes from Bajío International Airport (BJX) makes the logistics simple. I am fluent in English, so the whole consultation can happen in English. For patients traveling in, I coordinate visits to minimize trips: typically two visits cover a full surgery (evaluation with studies, procedure, and a condensed follow-up).
About Dr. Bolaños
What credentials does Dr. Bolaños hold?
Medical doctor from Universidad Anáhuac. Specialty in Ophthalmology from Hospital Nuestra Señora de la Luz I.A.P. (affiliated with UNAM). Advanced fellowship training in Cornea and Refractive Surgery at the same institution. Board certified by the Consejo Mexicano de Oftalmología since 2013 (member No. 3045). Approved by the International Council of Ophthalmology. Coordinator of the Corneal Transplant Program at Hospital Regional de Alta Especialidad del Bajío from 2014 to 2017. Medical license (cédula) 5659561, specialty license 8226491.
How many years of experience does he have in ophthalmology?
Over 15 years practicing as an ophthalmic surgeon. His main subspecialty is cornea and refractive surgery: cataracts, intraocular lenses, LASIK/PRK, keratoconus (crosslinking, rings, transplant) and pterygium. He has 292 combined Google reviews across both offices, with a 4.9 average.
Scheduling and insurance
How do I book an appointment?
By WhatsApp at +52 472 688 2050 or by filling out the form at /en/locations/. My team responds in under 24 hours and confirms which office fits your reason for the visit.
Does the doctor accept medical insurance?
He works with several insurance providers. The fastest way to check: send a WhatsApp message with your insurer’s name and your coverage type, and my team will confirm whether it’s direct billing, reimbursement, or if you need prior authorization. Not every procedure is covered the same way across insurers.
Book your evaluation
If you have a question of your own after reading these, message me on WhatsApp at +52 472 688 2050 or book directly from the contact page. I respond personally in under 24 hours.
Last updated: · Reviewed by Dr. Emmanuel Bolaños, ophthalmic surgeon (Mexican Board of Ophthalmology, member 3045).
Want me to look at your case?
Send me a WhatsApp with the reason for your visit. I will tell you whether an evaluation makes sense and which of my two offices to come to, before you make the trip. The whole visit can be in English.