Do You Actually Know What Happens During LASIK? — Questions & Answers

Explore key facts about LASIK, from what the procedure involves to important safety considerations and common side effects. Sharpen your understanding of this popular vision correction surgery.

This quiz contains 10 questions. Below is a complete reference of all questions, answer choices, and correct answers. You can use this section to review after taking the interactive quiz above.

1. Question 1: Meaning of LASIK

   What does LASIK stand for in vision correction surgery?

   • Laser-Assisted In Situ Keratomileusis
   • Lens Adjustment Surgical Intraocular Keratectomy
   • Light Amplification by Stimulated Keratoplasty
   • Laser Ablation for Sight Improvement of the Cornea
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   Correct answer: Laser-Assisted In Situ Keratomileusis

   Explanation: Laser-Assisted In Situ Keratomileusis is the correct full form of LASIK. The other options contain incorrect terminology or fabricated expansions that do not represent standard ophthalmic terms.

2. Question 2: LASIK Purpose

   In one sentence, what does the LASIK procedure actually do to help vision?

   • It alters the iris color for aesthetic changes.
   • It permanently reshapes the cornea to improve how light focuses for clearer vision.
   • It removes the entire lens and replaces it with a new one.
   • It thickens the retina for better light sensitivity.
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   Correct answer: It permanently reshapes the cornea to improve how light focuses for clearer vision.

   Explanation: LASIK works by reshaping the cornea for better light focus, resulting in clearer vision. It does not involve changing or replacing the lens, thickening the retina, or altering iris color.

3. Question 3: Understanding the Flap

   What is the “flap” created during LASIK surgery?

   • A lens inserted into the cornea for better vision.
   • A piece of retina removed to allow more light in.
   • A thin layer of corneal tissue that’s lifted to allow laser reshaping underneath, then placed back.
   • A section of the eyelid that is surgically removed.
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   Correct answer: A thin layer of corneal tissue that’s lifted to allow laser reshaping underneath, then placed back.

   Explanation: The flap refers to a thin layer of cornea temporarily lifted during LASIK to access deeper tissue for reshaping. The retina and eyelid are not involved, and no artificial lens is inserted in LASIK.

4. Question 4: Type of Laser

   Which type of laser is usually used to reshape the cornea in LASIK?

   • Excimer (UV) laser
   • Argon laser
   • CO2 laser
   • Nd:YAG laser
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   Correct answer: Excimer (UV) laser

   Explanation: An excimer (ultraviolet) laser is commonly used for the precise corneal reshaping in LASIK. CO2, Nd:YAG, and Argon lasers are used for different eye procedures but not typically for LASIK corneal ablation.

5. Question 5: Prescription Stability Importance

   Why do surgeons want your vision prescription to be stable before LASIK?

   • Because if your vision is still changing, LASIK results can drift since the change is permanent.
   • Because unstable prescriptions lead to eye infections.
   • Because insurance requires no vision changes for three years.
   • Because LASIK only works on farsighted people with stable eyes.
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   Correct answer: Because if your vision is still changing, LASIK results can drift since the change is permanent.

   Explanation: LASIK irreversibly alters the cornea, so unstable prescriptions could result in unsatisfactory outcomes if the vision continues to change. Unstable prescriptions do not directly cause infections, insurance policy is not the medical reason, and LASIK is not exclusive to farsighted cases.

6. Question 6: Avoiding LASIK Scenarios

   During which situation should you avoid LASIK because eye measurements can change unpredictably?

   • While wearing contact lenses continuously
   • After minor colds
   • During pregnancy or breastfeeding
   • After eating spicy foods
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   Correct answer: During pregnancy or breastfeeding

   Explanation: Pregnancy and breastfeeding can cause hormonal changes affecting eye measurements, making LASIK outcomes less predictable. Spicy foods, temporary contact lens use, and minor colds do not typically affect candidacy so strongly.

7. Question 7: Contraindicated Corneal Condition

   Which corneal condition is a clear reason NOT to have LASIK performed?

   • Keratoconus
   • Astigmatism
   • Presbyopia
   • Dry Eye Syndrome
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   Correct answer: Keratoconus

   Explanation: Keratoconus involves thinning and bulging of the cornea, making LASIK unsafe and contraindicated. Astigmatism and dry eyes may increase risk but are not absolute contraindications, while presbyopia involves age-related focus loss, not corneal structure.

8. Question 8: Common Short-Term Side Effects

   What are two common short-term side effects after LASIK surgery?

   • Tearing and blurred vision that lasts for years
   • Permanent corneal opacity and blindness
   • Dry eyes and temporary visual issues like glare or halos
   • Complete vision loss and severe eye pain
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   Correct answer: Dry eyes and temporary visual issues like glare or halos

   Explanation: After LASIK, dry eyes and temporary effects such as glare or halos are common. Complete vision loss, permanent blind spots, or multi-year blurring are not typical side effects following proper LASIK.

9. Question 9: Post-LASIK Care

   Why is it important not to rub your eye soon after LASIK?

   • Because it induces immediate lens dislocation.
   • Because it leads to rapid pupil dilation.
   • Because it causes permanent color changes in the iris.
   • Because rubbing can dislodge or move the healing corneal flap.
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   Correct answer: Because rubbing can dislodge or move the healing corneal flap.

   Explanation: Rubbing the eye too soon can disturb the repositioned corneal flap, potentially affecting healing and vision. The iris color, pupil size, and lens are not affected by post-LASIK eye rubbing.

10. Question 10: PRK vs. LASIK

    What is a main difference between PRK and LASIK vision correction procedures?

    • PRK is only used to correct color blindness.
    • PRK removes the thin surface layer of the cornea instead of making a flap; recovery is usually slower.
    • LASIK uses radio waves while PRK uses lasers.
    • PRK implants a contact lens while LASIK removes the lens.
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    Correct answer: PRK removes the thin surface layer of the cornea instead of making a flap; recovery is usually slower.

    Explanation: PRK eliminates the surface epithelium instead of creating a flap, resulting in slower recovery compared to LASIK. It does not target color blindness, both use lasers, and neither involve permanent lens implantation or removal.