How to Check Your Eligibility and Prepare for Advanced Laser Vision Correction at Nethradhama

Taking the first step to understand your eligibility removes the guesswork out of your vision correction journey. While our advanced diagnostics team at Nethradhama Super Speciality Eye Hospital performs a rigorous, 2-hour eye scan to finalize your medical clearance, we can absolutely look at the primary clinical checkboxes and pre-scan preparation guidelines right now.

Both SMILE pro and Ziemer CLEAR are advanced, flapless lenticule extraction techniques. Because they operate inside the cornea rather than on the surface, their eligibility metrics are highly specific.

Part 1: Am I Eligible for SMILE pro or CLEAR?

The ultimate green light relies on your unique corneal blueprint, but you can check your primary medical indicators using this list:

The Basic Medical Checkpoints

• Age: You must be at least 18 years or older. This is the age when the eye’s structural growth typically settles.
• Prescription Stability: Your power must be stable for at least 6 to 12 months (meaning your prescription hasn’t shifted by more than 0.50 diopters(D)
• General Eye Health: Your eyes must be free from progressive conditions like keratoconus, advanced glaucoma, cataracts, or severe, uncontrolled dry eye syndrome.
• Systemic Health: You should not be currently pregnant or nursing, as hormonal changes can temporarily alter the shape and fluid balance of your cornea.

Prescription Ranges: SMILE pro vs. Ziemer CLEAR

Depending on whether your prescription involves nearsightedness, farsightedness, or astigmatism, the technologies cross-check differently:

If you are looking at ZEISS SMILE pro:

• Nearsightedness (Myopia): Can correct down to -10.00 diopters.
• Astigmatism: Can correct up to -5.00 diopters.
• Farsightedness (Hyperopia): Thanks to the advanced VisuMax 800 platform, certain treatment patterns can address farsightedness (up to +7.00 diopters depending on global regional approvals), though it is most widely recognized for its elite performance in myopia and astigmatism.

If you are looking at Ziemer CLEAR:

• Nearsightedness (Myopia): Highly effective for corrections up to -10.00 diopters.
• Astigmatism: Corrects astigmatism safely up to -5.00 diopters.
• Farsightedness (Hyperopia): Not applicable. The CLEAR software profile is strictly engineered for nearsighted and astigmatic corrections. 

The Deciding Factor: Even if your prescription falls perfectly into these numbers, the ultimate clearance relies on Corneal Thickness. Because lenticule extraction removes a tiny layer from inside the cornea, your eye must have a healthy, standard thickness to ensure absolute long-term structural integrity. If our diagnostic scans show that your cornea is naturally on the thinner side, our surgeons will smoothly guide you toward PRK, which preserves maximum tissue thickness by working entirely on the surface.

Part 2: How to Prepare for Your Pre-Surgery Diagnostic Scan

Think of this evaluation as creating a highly precise blueprint map of your eye. Because our advanced robotic lasers—like the SMILE pro (VisuMax 800) and Ziemer CLEAR—rely entirely on these initial scans to customize your treatment pattern, your eye surface needs to be in its completely natural, unaltered state.

Here is exactly how you need to prepare your eyes to ensure 100% measurement accuracy:

1. The Contact Lens “Hiatus” (Most Critical Step)

Contact lenses rest directly on your cornea, temporarily warping its natural curvature and causing mild tissue swelling. To let your cornea “rebound” to its true shape, you must switch to glasses before your appointment according to this strict timeline:

• Soft Daily Disposable Lenses: Discontinue wearing them for at least 7 days before your scan.
• Soft Toric (Astigmatism) or Monthly Lenses: Discontinue for 10 to 14 days.
• Rigid Gas Permeable (RGP) or Hard Lenses: Discontinue for at least 3 to 4 weeks.

Important Note: Do not wear your contacts even for a single hour during this break. Doing so resets the corneal stabilization clock and will alter your diagnostic map, delaying your path to surgery.

2. On the Day of Your Diagnostic Scan

• No Eye Makeup or Cosmetics: Avoid applying eye shadows, liners, mascara, face creams, or perfumes on the morning of your evaluation. Microscopic cosmetic particles can easily get into your tear film, interfering with the high-precision laser imaging cameras.
• Arrange for a Driver: During the 2-hour checkup, our medical team will apply specialized dilating eye drops to thoroughly check your retina. These drops will make your vision temporarily blurry and highly sensitive to light for 4 to 6 hours. You will not be able to safely drive yourself home.
• Bring Your Sunglasses: Because your dilated pupils will let in excess light, a pair of dark sunglasses will make your journey home comfortable.
• Carry Your Medical Records: Bring along your current glasses and any previous optical prescriptions. This helps our team track the long-term stability of your prescription.

Ready to Begin Your Journey? 

By giving your eyes a short break from contact lenses and following these clean-surface guidelines, you ensure that our specialists get the most pristine data possible to clear you for surgery. Nethradhama provides advanced, customized treatments across our Bengaluru network—including Jayanagar, Indiranagar, Whitefield, Rajajinagar, and Yelahanka. You can easily schedule your advanced diagnostic checkup by calling our central desk at 080-26088000.