Nokea
The nurse clarifies that the difference between a photorefractive keratectomy (PRK) and a laser in-situ keratomileusis (LASIK) is that a LASIK is intended to improve vision in which way?
- A. reshapes the central cornea.
- B. makes partial-thickness radial incisions in the cornea.
- C. removes some internal layers of the cornea.
- D. implants intracorneal rings.
Correct Answer: C
Rationale: The LASIK procedure removes some of the internal layers of the cornea affecting the central zone of vision.
You may also like to solve these questions
When the newly blind patient asks the nurse how to obtain assistance, who might the nurse suggest contacting?
- A. American Red Cross
- B. American Foundation for the Blind for a list of agencies
- C. Local hospital social worker
- D. The public health department
Correct Answer: B
Rationale: The American Foundation for the Blind has lists of agencies to assist and educate the visually impaired patient.
Which anatomical change is associated with diabetes retinopathy?
- A. Capillaries in retina hemorrhage
- B. Long-term overdosing of insulin
- C. Retinal detachment
- D. Aging
Correct Answer: A
Rationale: Retinopathy is caused when the capillaries in the retina have aneurysms or hemorrhage.
The nurse will provide which advise for a patient who has severe vertigo from labyrinthitis?
- A. Lean against a wall and not move the head forward until vertigo lessens.
- B. Bend at the waist and take several deep breaths.
- C. Drink an iced drink slowly.
- D. Lie immobile and hold the head in one position until the vertigo lessens.
Correct Answer: D
Rationale: Lying immobile and holding the head in one position will lessen vertigo.
The patient tells the nurse that he is legally blind. In which way will this information impact the plan of care for this patient?
- A. The patient would be considered totally blind.
- B. This patient probably has some light perception, but no usable vision.
- C. This patient has some usable vision, which enables function at an acceptable level.
- D. The nurse would need to determine how this patient's visual impairment affects normal functioning.
Correct Answer: D
Rationale: Legal blindness' refers to individuals with a maximum visual acuity of 20/200 with corrective eyewear and/or visual field sight capacity reduced by 20 degrees. Categories have been established to help determine the exact extent of the vision loss and what assistive measures are appropriate for the individual. The nurse will need more information as to the exact extent of the vision loss for this patient.
Which term describes the process when the lens of the eye changes its curvature to focus on the retina?
- A. Accommodation
- B. Constriction
- C. Convergence
- D. Refraction
Correct Answer: A
Rationale: The ability of the lens to alter its curvature as it focuses on the retina is accommodation.