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Take Test CET C6449



Refractive Surgery – the answer to my visual problems?
2 CET Points (General) Optometrists and Dispensing Opticians

To receive your CET points for this article, complete the Multiple Choice Questions.
A pass mark of 66% (8 out of 12 correct answers) must be achieved.
Only one attempt is allowed. The deadline for responses is 2nd April 2009


*Q1.Which of the following procedures are UK Optometrists permitted to perform?
A.PRK
B.Holmium keratoplasty
C.Orthokeratology
D.Keratomileusis
*Q2.Which of the following statements about intraocular lens (IOL) surgery is correct?
A.The crystalline lens is always removed
B.The IOL can be a foldable design
C.They are placed in the anterior chamber only
D.They are only available in multifocal design
*Q3.Which of the following complications is not usually a concern of LASIK?
A.Epithelial in-growth
B.Dry eyes
C.Globe rupture
D.Interstitial keratitis
*Q4.Which of the following complications is not usually a concern of LASEK?
A.Pain
B.Dry eyes
C.Sterile punctate keratitis
D.Interstitial keratitis
*Q5.Which of the following statements is true?
A.Epikeratoplasty is a form of laser surgery that uses material from a donor cornea
B.In keratomileusis the lathed corneal button is sutured on top of the cornea.
C.Both keratectomy and keratotomy can be used to treat astigmatism
D.The microkeratome is used to reshape the stromal surface during LASIK
*Q6.Excimer lasers in PRK and LASIK:
A.Ablate tissue by vaporisation
B.Remove tissue by thermal effects
C.Remove tissue along a linear incision
D.Have wavelengths in the infrared spectrum
*Q7.The most popular excimer laser for laser surgery is the ArF because:
A.The UV radiation is able to break molecular bonds in the cornea
B.It produces a more marked thermal effect than KrF
C.It was the first to receive FDA approval
D.The laser head photon energy is around 240 V
*Q8.Which of the following statements about LASIK is correct?
A.It is more accurate and less invasive than PRK
B.The microkeratome is used to create a corneal button and to reshape the stroma
C.It is the same procedure as keratotomy without the use of a cryolathe
D.Myopia and hyperopia are corrected by ablating different parts of the stroma
*Q9.Complications with PRK may include all of the following, apart from:
A.Regression back to ametropia.
B.Discomfort glare
C.Decentered ablations
D.Diffuse lamellar keratitis
*Q10.Surgery that have been successfully used in presbyopia include all of the following apart from:
A.Clear lens extraction with multifocal IOL
B.LASIK correction in accordance with monovision techniques
C.Multifocal corneal ablation
D.Accommodating IOLs
*Q11.Which of the following is false with regard fitting CL post-myopic LASIK?
A.Corneal sensitivity is reduced
B.Corneal shape is no longer prolate
C.Corneal thickness is reduced
D.Patients may be using preserved ocular medication
*Q12. Which of the following is untrue with regard to radial keratotomy surgery?
A.It corrects myopia or hyperopia
B.It causes flattening of the central cornea
C.It involves corneal incisions of 90% depth
D.It relies on the healing effect of the cornea

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