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1.What is the most common cause of cataract formation

  1. Corticosteroids treatment
  2. Ionizing radiation
  3. Aging
  4. Infrared radiation
  5. Ultraviolet radiation

Correct Answer: C) Aging


2. How much radiation dose to the eye lens is necessary for the production of radiation injuries?

  1. 0.0001 Gy
  2. 0.001 Gy
  3. 0.01 Gy
  4. 0.25 Gy
  5. 0.5 Gy

Correct Answer: E) 0.5 Gy  


3. What is the recommended dose limit for the eyes?

  1. 10 mSv
  2. 20 mSv
  3. 40 mSv
  4. 60 mSv
  5. 80 mSv

Correct Answer: B) 20 mSv  


4. What is the best protective measure to prevent radiation induced cataracts?

  1. Positioning of the X-ray tube below the table
  2. Wearing leaded glasses + use scatter-shielding screens
  3. Use pulsed fluoroscopy
  4. Stay as far away as clinically possible from the X-ray tube
  5. All of the above

Correct Answer: E) All of the above


5. What is the best treatment for visually significant radiation induced cataract?

  1. Topical corticosteroids
  2. Rest and avoid further radiation exposure
  3. Surgical cataract extraction + Intraocular lens implantation
  4. Visual correction with contact lens
  5. Refractive surgery with excimer laser (LASIK)

Correct Answer: C) Surgical cataract extraction + Intraocular lens implantation 


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