Eye Center of Texas Blog

Is My Vision Too Bad for LASIK Eye Surgery?

Have you ever wondered, “Is my vision too bad for LASIK eye surgery?” If so, Eye Center of Texas has some news that just might make your day. Technology has improved such that patients with severe vision impairments may be able to achieve improved vision with LASIK eye surgery.

Learn about the wide range of eye power levels compatible with LASIK and other requirements for LASIK eye surgery today.

Understanding refractive errors and diopters

There are a lot of misconceptions around who can and can’t have LASIK eye surgery, which is why we receive so many questions like “Is my vision too bad for LASIK eye surgery” or, “Can my eyes be too bad for LASIK?” It all comes down to your maximum and minimum eye power.

So, what are people talking about when they mention maximum eye power for LASIK and minimum eye power for LASIK? The confusion probably stems from a lack of understanding as to how we measure maximum and minimum prescription ranges for LASIK. Typically, these ranges are determined by a person’s maximum and minimum eye power, which can be influenced by refractive errors.

Refractive errors — the light refraction errors created by a misshapen lens or cornea that cause common vision problems — are measured in diopters (D). Negative diopters indicate myopia (nearsightedness) and positive numbers indicate hyperopia (farsightedness).

Prescription ranges for LASIK eye surgery

While the range of diopters which LASIK can treat depends on the technology your surgeon uses, these are commonly recognized standards.

  • Myopia, or nearsightedness: performing LASIK on eyes with myopia that is beyond a certain negative diopter measurement can cause nighttime vision problems and halos.
  • Hyperopia, or farsightedness: performing LASIK on eyes with hyperopia that is beyond a certain diopter measurement can cause nighttime vision problems and halos. Note that the range of diopter measurements for farsightedness is smaller than that of myopia.
  • Astigmatism, when both near and far objects are blurred: the LASIK for astigmatism limits are more variable. Each of the following has its own acceptable range, as is defined by your doctor.
    • Astigmatism combined with myopia
    • Astigmatism combined with hyperopia
    • Mixed astigmatism patients

Read more here if you’ve ever asked yourself, “Can LASIK correct astigmatism?

What are the requirements for LASIK eye surgery?

Can LASIK give you 20/20 vision? Yes, it can. However, you must also meet other requirements for LASIK eye surgery. It’s worth going over the other parameters doctors use to determine who is and who is not suitable for laser eye surgery.

These include having corneal tissue that’s thick enough — approximately 420 microns — for LASIK. Most healthy eyes have corneas that around 550 microns thick.

Your eye health in general must be in good standing: Your prescription must not change for 12 months, you must not suffer from glaucoma, dry eyes, or cataracts; and you must have an average pupil size. Finally, women who are pregnant or nursing should wait to have LASIK. If you meet all of these conditions, then you may be able to correct your vision with LASIK eye surgery.

However, even if you’re a perfect candidate for LASIK surgery, it’s important that you follow through with pre-LASIK preparation, and that you choose a quality eye surgeon like those at Eye Center of Texas. Not doing so can increase your likelihood of needing contacts after LASIK.

Do I have other laser eye surgery options?

When your prescription or eye health disqualifies you from being a good LASIK candidate, it’s always worth speaking to your doctor about your other options.

For example, if you don’t qualify for LASIK, it’s possible that PRK eye surgery may be option for you. PRK is LASIK’s predecessor and can have the same positive results as LASIK. It has different ranges of acceptable eye power, and is available to some patients who do not meet all of the other requirements for LASIK eye surgery.

Occasionally, some patients even chose to have PRK LASIK enhancement after their original LASIK surgery.

20/20 vision (or better!) is possible with LASIK at Eye Center of Texas

The majority of patients who choose to have LASIK eye surgery report that their vision is now at 20/20 or better.

Don’t sit around wondering “Is my vision too bad for LASIK eye surgery?” and avoid taking action. You deserve clear vision. Eye Center of Texas, known for providing some of the best LASIK in Houston, is helping people restore their eyesight each and every day.

And remember: Even if your prescription doesn’t make you a candidate for LASIK now, that doesn’t mean LASIK will be unavailable to you for forever. Technology is always improving, and we encourage you to continue to check back.

To meet with our nationally recognized surgeons, call us at 713-395-1515 or contact us online to set up your free consultation today.

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6565 W. Loop S. Suite 650

Bellaire, TX 77401

Medical Office: 713-797-1010

Medical Fax: 713-357-7276

LASIK/ReSTOR: 713-395-1515

LASIK/ReSTOR Fax: 713-357-7278


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Pasadena, TX 77504

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15400 S.W. Freeway, Suite 301

Sugar Land, TX 77478

Medical Office: 281-277-1010

Medical Fax: 281-277-4504

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455 E. Medical Center Blvd., Suite 110

Webster, TX 77598

Medical Office: 281-332-1397

Medical Fax: 281-338-1215


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Katy, TX 77450

Medical Office: 713-797-1010

Medical Fax: 713-357-7276

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Park Place Professional Building 100 Medical Center Blvd Suite 118

Conroe, TX 77304

Medical Office: 713-797-1010

Medical Fax: 713-357-7276