Correct Refractive Surgery in Thin Corneas

Refractive eye surgery

When your doctor assesses your eyes for proper refractive surgery, an important factor to think about is your corneal thickness. Most doctors will take into consideration your age, degree of refractive error, and therefore the presence of a disease called keratoconus in your eye for proper refractive surgery. He or she is going to then calculate the corneal thickness that is still after performing LASIK on your eyes to work out the eligibility. It’s always advised to urge proper eye nutrition from the start itself to avoid any eye issues later.

Although a corneal thickness of 485 µm could also be normal for proper refractive surgery, which was earlier thought to be a stop for LASIK, you’ll be considered suitable for LASIK only within the deficiency of forme fruste keratoconus, skew deviation, or keratometric readings greater than 47.00 D. These are determined by advanced studies of the form of your cornea, called corneal topography. During this case, you’ll not be an appropriate candidate for the right refractive surgery

Studies have observed no enhanced risk for patients with a corneal thickness of 485 µm who had LASIK or Sub Bowman Keratomilieusis, SBK. Surface ablation is typically addressed as a treatment option, in thin corneas, since it doesn’t require a corneal flap, or raises a flap which incorporates only the epithelium and not the stroma, and is consequently thinner. It means a residual corneal bed could also be thicker than after a standard LASIK, but many experts believe that the cornea is simply as strong after SBK because it is after surface ablation.

To understand the difference, one must know what happens during LASIK and Surface Ablations. Both refractive surgeries correct the refractive power of the attention by modulating the form of the cornea.

Differences between LASIK and Surface Ablations


Correct Refractive Surgery

Throughout LASIK, a skinny flap of cornea is raised, using either a mechanical keratome (conventional LASIK) or using the laser itself (bladeless or blade-free or all-laser LASIK). This flap is constituted by the epithelium of the cornea, and a part of the stroma. Following this, the laser, which is regulated by a strong computerized algorithm, shapes the surface of the cornea by ablating its stroma (component tissue) so that the refractive power of the attention is corrected, and one doesn’t need glasses for perfect vision.

Surface Ablation

During Photorefractive Keratotomy, PRK, the surgeon will remove the topmost layer of the cornea. The topmost layer called the epithelium is removed using an alcohol solution, to show the stroma. The ophthalmologist then reshapes your cornea employing a laser to make sure a spectacle-free vision. There’s no flap raised, and only the epithelium is removed, which grows back over three to four days. After the procedure, the surgeon inserts a bandage contact to guard the cornea until the epithelial layer grows back. The thick contact also helps decrease the discomfort during this point, which has been variably described from being mild to moderate, alongside the feeling of getting “something,” or a far off body, within the eye.

Advanced Surface Ablations, ASA

ASA collectively refers to a gaggle of surgeries including LASEK (in which a trephine removes the epithelial flap, which is replaced at the top of surgery), Epi LASEK (which uses a specific microkeratome, the Epi-keratome to get rid of the epithelial flap, which is replaced at the top of surgery) and Supra LASIK or touch-less LASIK (which is a surface laser procedure that manages a technologically advanced excimer laser to get rid of the surface cells before performing the reshaping of the cornea).

The disadvantages of the surface ablations, including Supra LASIK, are:

  • Discomfort for the primary two or three days following treatment, until the epithelium grows back.
  • Vision recovery takes longer as compared to LASIK.
  • Small risk of corneal haze since the epithelium is removed during the procedure.
  • The obvious advantage of ASAs is that they’re useful for patients who have had a cornea transplant before. However, the potential advantage that they’re deemed to supply to people with thinner corneas is now being challenged.
  • LASIK technology grows more advanced and customized to the requirements of the individual cornea. Thus surgeons like better to offer one among the newer variants of LASIK, even to patients with thinner corneas.

Procedures for People with Thin Corneas

Wavefront-Guided LASIK

This technology uses computerized imaging technology to make a detailed three-dimensional “map” of the patient’s cornea to program the excimer laser for reshaping the cornea. Wavefront technology can measure very minute irregularities within the surface of the cornea, taking 200 measurements, to realize simpler and safer vision correction than conventional LASIK.

Contoura Vision Topography Guided LASIK

This technology is that the latest FDA approved LASIK eye surgery available within the U.S, and other parts of the planet. It corrects the blurred vision supported the eye’s unique shape. While other technologies supported the present glasses or contact prescription. It measures 22,000 points as against the currently available wavefront-guided LASIK that measures around 200 points on the cornea. This suggests that the littlest defects of shape, optics, and curvature, even within the periphery are often considered for, leading to the correction of refractive errors with an accuracy not achieved till now.

Contoura Vision Topography Guided LASIK

Technology allows the pc to get an individualized treatment algorithm. It controls the extremely specific laser machine.

Because of this precision and accuracy, Contoura Vision Topography Guided LASIK offers the subsequent distinct advantages:

  • Easier night driving, with decreased incidence of haloes and starburst
  • Lessened light sensitivity and glare
  • Better reading speed and clarity
  • Excellent quality of vision than glasses or contact lenses
  • Lesser higher-order aberrations, and better visual comfort


The creation of the flap is so accurately measured within the newer versions of LASIK. Due to this, the probabilities of corneal complications, even in thin corneas are significantly reduced. There’s sufficient evidence to mention that this provides the patient with a far better quality of vision.

If you’re also trying to find Correct Refractive Surgery in Thin Corneas, visit EyeMantra today.

Our expert will guide about the Surgery intimately. We also render various services like cornea surgery, Retina Surgery, spec removal, Computer Vision Correction, Paediatric Ophthalmologist, etc.

You can call us at 8851044355. You’ll also mail at for booking appointments with us

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