Intraocular lens power calculation after corneal refractive surgery: Double-K method
Jaime Aramberri, MD

1. The main reason for inaccurate IOL power calculation for an eye with previous refractive surgery is
a. Different stromal refractive index
b. Flatter central power of cornea
c. Steeper paracentral power
d. All the above

2. If corneal power after keratorefractive surgery can be determined,
a. The same SPK formula can be used for IOL calculation.
b. The current calculation formula would still not provide accurate IOL power.
c. It would be overestimated only by keratometers.
d. It would be underestimated by a corneal topographer.

3. According to the article, what was the predictability of IOL power using the double-K method in patients following keratorefractive surgery?
a. 70%
b. 80%
c. 90%
d. 96%

Effect of methods of myopia correction on visual acuity, contrast sensitivity, and depth of focus
Ying-Khay Nio, MD, Nomdo M. Jansonius, MD, PhD, Robert H. J. Wijdh, MD, W. Houdijn Beekhuis, MD, Jan G .F. Worst, MD, PhD, Sverker Norrby, PhD, Aart C. Kooijman, PhD

4. According to the article,
a. The low myopia group had a significantly larger depth of focus.
b. The LASIK group had the best UCVA.
c. The LASIK group had the best corrected contrast sensitivity.
d. The Artisan claw group had worse UCVA than the LASIK group.

5. What are the advantages of Intacs?
a. The ability to be used in high myopes
b. Reversibility
c. Improvement of contrast sensitivity in patients
d. Improvement of spherical corneal aberrations

6. According to the article, the best refractive surgery procedure for high myopes is
a. LASIK
b. Contact lenses
c. Intacs
d. Artisan claw lens

Spherical aberration after laser in situ keratomileusis and photorefractive keractectomy: Clinical results and theoretical models of etiology
Peter S. Hersh, MD, Kristen Fry, OD, J. Warren Blaker, PhD

7. According to the article, after excimer laser procedures,
a. All corneas had negative asphericity within the ablation zone.
b. Corneas were changing from an oblate to a prolate optical contour.
c. Corneas were changing from a prolate to an oblate optical contour.
d. There was no change in spherical aberration in most corneas.

8. According to the study, the mean change in spherical aberration was
a. + 1.09 ± 0.67 of positive asphericity
b. -2.30 ± 0.50 of negative asphericity
c. + 0.50 ±0.30 of positive asphericity
d. - 2.10 ± 0.65 of negative asphericity

9. A trend toward greater change in asphericity was observed among eyes with
a. Higher correction
b. Mild myopia
c. Irregular astigmatism
d. High degree of oblique astigmatism

Early objective assessment of intraocular inflammation after phacoemulsification cataract surgery
Oliver Findl, MD, Michael Amon, MD, Vanessa Petternel, MD, Andreas Kruger, MD

10. How often were postoperative measurements of aqueous flare and cell count taken in the first 6 hours after surgery?
a. Every 30 minutes in the first 3 hours; then hourly
b. Hourly
c. Every 2 hours
d. Every 15 minutes in the first hour; then hourly

11. According to the article, when was the peak inflammatory response after surgery?
a. 6 hours
b. 24 hours
c. 1 hour
d. 12 hours

12. According to the study, postoperative inflammation was hardly detectable ____ hours/days after surgery?
a. 12 hours
b. 1 to 2 days
c. 3 days
d. 5 days

Group IIA phospholipase A2 content in tears of patients having photorefractive keratectomy
Valtteri V. Aho, MD, Juha M. Holopainen, MD, Timo Tervo, MD, Jukka A.O. Moilanen, MD Timo Nevalainen, MD, K. Matti Saari, MD

13. Group IIA phospholipase A2 (GIIAPLA2)
a. Is capable of killing a broad spectrum of gram-negative bacteria
b. Is capable of killing anaerobic bacteria
c. Consists of 11 groups of PLA2s
d. Is a hydrophobic enzyme

14. According to the article,
a. The GIIAPLA2 concentration was significantly lower 2 days after PRK than preoperatively.
b. The tear fluid flow rate was significantly lower 2 days after PRK.
c. GIIAPLA2 concentration was significantly lower at 7 days than at 2 days.
d. The tear fluid flow rate was higher preoperatively than 7 days after PRK.

15. The decrease in GIIAPLA2 concentration in tears may be due to
a. Hyposecretion of reflex tears
b. Hypersecretion of reflex tears
c. Damage to goblet cells
d. Worsening in quality of the lipid layer of the tear film