Prediction error after pediatric cataract surgery with intraocular lens implantation: Contact versus immersion A-scan biometry

Rupal H Trivedi, M Edward Wilson
Journal of Cataract and Refractive Surgery 2011, 37 (3): 501-5

PURPOSE: To evaluate the accuracy of pediatric intraocular lens (IOL) calculations performed using contact and immersion A-scan biometry.

SETTING: Storm Eye Institute, Charleston, South Carolina, USA.

DESIGN: Evaluation of diagnostic test or technology.

METHODS: Data from a prospective study of pediatric eyes that had in-the-bag implantation of an AcrySof SN60WF IOL and had refraction results available from 14 days to 3 months postoperatively were retrospectively analyzed. The contact and immersion A-scan biometry techniques were performed in each eye and compared.

RESULTS: The mean age at surgery of the 22 patients (22 eyes) was 4.8 years ± 4.1 (SD). The mean prediction error was +0.4 ± 0.7 diopter (D) in the contact group and -0.4 ± 0.8 D in the immersion group (P < .001) and the mean absolute prediction error, 0.7 ± 0.4 D and 0.7 ± 0.6 D, respectively (P=.694). The absolute prediction error was less than 0.5 D in 5 eyes (23%) using the contact technique and 11 eyes (50%) using the immersion technique. The mean postoperative spherical equivalent was +2.9 ± 2.5 D, which was significantly different from the mean predicted refraction for contact A-scan (3.3 ± 2.8 D; P=.010) but not immersion A-scan (2.5 ± 2.5 D; P=.065).

CONCLUSIONS: There was a significant difference in prediction error between postoperative refractive results obtained with contact biometry and immersion A-scan biometry in children. Based on the results, the immersion A-scan technique is recommended for pediatric IOL power calculation.

Full Text Links

Find Full Text Links for this Article


You are not logged in. Sign Up or Log In to join the discussion.

Related Papers

Remove bar
Read by QxMD icon Read

Save your favorite articles in one place with a free QxMD account.


Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"

We want to hear from doctors like you!

Take a second to answer a survey question.