Free LASIK Equipment Handling Questions and Answers — Questions and Answers

Question 1: Which laser is primarily used to reshape the cornea during LASIK procedures?

Argon laser
Nd:YAG laser
Excimer laser (Correct answer)
Femtosecond laser

Correct answer: Excimer laser

The excimer laser is the primary tool used in LASIK surgery to precisely reshape the cornea. It emits cool, ultraviolet light pulses that ablate (vaporize) microscopic amounts of corneal tissue without damaging surrounding cells. This controlled tissue removal corrects refractive errors like myopia, hyperopia, and astigmatism, allowing light to focus properly on the retina.

Question 2: What is the role of the femtosecond laser in LASIK procedures?

Used to measure pupil size
Used for creating the corneal flap (Correct answer)
Used to seal blood vessels
Used for removing cataracts

Correct answer: Used for creating the corneal flap

In modern all-laser LASIK (also known as femto-LASIK or bladeless LASIK), the femtosecond laser is used to create the thin, hinged corneal flap. This laser generates rapid, ultra-short pulses of light to create microscopic bubbles within the corneal tissue, precisely separating a layer to form the flap. This method offers enhanced precision and safety compared to mechanical microkeratomes.

Question 3: What function does the microkeratome serve in traditional LASIK?

It reshapes the cornea
It suctions out fluid
It creates the corneal flap (Correct answer)
It removes epithelium

Correct answer: It creates the corneal flap

In traditional LASIK, a microkeratome is a precision surgical instrument with an oscillating blade used to create the thin, hinged corneal flap. This flap is lifted to allow the excimer laser to reshape the underlying corneal tissue. After the laser treatment, the flap is repositioned, where it naturally adheres without stitches.

Question 4: Why must the LASIK suite maintain specific humidity levels?

To prevent equipment overheating
To ensure patient comfort
To prevent condensation on instruments
To maintain laser calibration and accuracy (Correct answer)

Correct answer: To maintain laser calibration and accuracy

Maintaining specific humidity and temperature levels in the LASIK suite is critical for the precise operation and calibration of the excimer laser. Fluctuations in humidity can affect the laser's energy delivery and the hydration of the corneal tissue, potentially leading to inaccurate tissue ablation and suboptimal visual outcomes. A controlled environment ensures consistent and accurate treatment.

Question 5: What personal protective equipment is required for staff during LASIK?

Sterile gloves and gowns
Lead aprons
Protective eyewear (Correct answer)
Full hazmat suits

Correct answer: Protective eyewear

LASIK procedures involve the use of high-energy lasers, which can pose a risk of ocular damage from scattered or reflected laser light. Protective eyewear, such as laser safety glasses, is essential for staff to shield their eyes from potential exposure. This ensures safety in the laser operating environment.

Question 6: Which maintenance step is critical before using a LASIK laser system each day?

Sterilizing the laser head
Recharging the laser battery
Cleaning the room air filters
Performing laser calibration (Correct answer)

Correct answer: Performing laser calibration

LASIK lasers reshape the cornea with micron-level precision, making accurate energy delivery and beam profile critical. Performing laser calibration daily ensures the system is operating within its specified parameters, guaranteeing the accuracy and safety of the treatment. This prevents errors in corneal ablation that could lead to suboptimal visual outcomes.

Question 7: What system ensures patient eye remains stationary during LASIK?

Retinoscope
Slit lamp
Orbscan
Eye tracker (Correct answer)

Correct answer: Eye tracker

During LASIK, even minor eye movements can compromise the precision of the laser treatment. An eye tracker continuously monitors the patient's eye position in real-time and adjusts the laser beam accordingly. This technology ensures that the laser precisely targets the intended corneal tissue, maintaining accuracy despite involuntary eye movements.

Question 8: Which LASIK tool provides suction to stabilize the eye?

Speculum
Suction ring (Correct answer)
Retinoscope
Topography device

Correct answer: Suction ring

The suction ring is a crucial tool in LASIK that is applied to the eye to temporarily increase intraocular pressure and immobilize the globe. This stabilization creates a firm, flattened surface for the microkeratome or femtosecond laser to precisely create the corneal flap. It prevents eye movement and ensures uniform flap thickness.

Question 9: What must be verified in the laser software prior to surgery?

Humidity levels
Patient’s age
Treatment parameters (Correct answer)
Surgeon credentials

Correct answer: Treatment parameters

Treatment parameters, including sphere, cylinder, and axis, are unique to each patient and dictate the exact laser ablation profile. Verifying these parameters in the laser software against the patient's pre-operative measurements is a critical safety step. This ensures the correct refractive correction is applied, preventing errors that could lead to under- or over-correction.

Free LASIK Equipment Handling Questions and Answers

Which laser is primarily used to reshape the cornea during LASIK procedures?