Predictability of intraocular lens calculation and early refractive status: the Infant Aphakia Treatment Study
Deborah K VanderVeen, Azhar Nizam, Michael J Lynn, Erick D Bothun, Scott K McClatchey, David R Weakley, Lindreth G DuBois, Scott R Lambert, Infant Aphakia Treatment Study Group, Scott R Lambert, Lindreth G DuBois, Michael J Lynn, Betsy Bridgman, Marianne Celano, Julia Cleveland, George Cotsonis, Carey Drews-Botsch, Nana Freret, Lu Lu, Azhar Nizam, Seegar Swanson, Thandeka Tutu-Gxashe, E Eugenie Hartmann, Clara Edwards, Claudio Busettini, Samuel Hayley, Scott R Lambert, Edward G Buckley, David A Plager, M Edward Wilson, Michael J Lynn, Lindreth G DuBois, Carolyn Drews-Botsch, E Eugenie Hartmann, Donald F Everett, Buddy Russell, Michael Ward, M Edward Wilson, Margaret Bozic, Deborah K VanderVeen, Theresa A Mansfield, Kathryn Bisceglia Miller, Stephen P Christiansen, Erick D Bothun, Ann Holleschau, Jason Jedlicka, Patricia Winters, Jacob Lang, Elias I Traboulsi, Susan Crowe, Heather Hasley Cimino, Kimberly G Yen, Maria Castanes, Alma Sanchez, Shirley York, David T Wheeler, Ann U Stout, Paula Rauch, Kimberly Beaudet, Pam Berg, Scott R Lambert, Amy K Hutchinson, Lindreth G DuBois, Rachel Robb, Marla J Shainberg, Edward G Buckley, Sharon F Freedman, Lois Duncan, B W Phillips, John T Petrowski, David Morrison, Sandy Owings, Ron Biernacki, Christine Franklin, David A Plager, Daniel E Neely, Michele Whitaker, Donna Bates, Dana Donaldson, Stacey Kruger, Charlotte Tibi, Susan Vega, David R Weakley, David R Stager Jr, Joost Felius, Clare Dias, Debra L Sager, Todd Brantley, Robert Hardy, Eileen Birch, Ken Cheng, Richard Hertle, Craig Kollman, Marshalyn Yeargin-Allsopp, Cyd McDowell, Donald F Everett, Allen Beck, Deborah K VanderVeen, Azhar Nizam, Michael J Lynn, Erick D Bothun, Scott K McClatchey, David R Weakley, Lindreth G DuBois, Scott R Lambert, Infant Aphakia Treatment Study Group, Scott R Lambert, Lindreth G DuBois, Michael J Lynn, Betsy Bridgman, Marianne Celano, Julia Cleveland, George Cotsonis, Carey Drews-Botsch, Nana Freret, Lu Lu, Azhar Nizam, Seegar Swanson, Thandeka Tutu-Gxashe, E Eugenie Hartmann, Clara Edwards, Claudio Busettini, Samuel Hayley, Scott R Lambert, Edward G Buckley, David A Plager, M Edward Wilson, Michael J Lynn, Lindreth G DuBois, Carolyn Drews-Botsch, E Eugenie Hartmann, Donald F Everett, Buddy Russell, Michael Ward, M Edward Wilson, Margaret Bozic, Deborah K VanderVeen, Theresa A Mansfield, Kathryn Bisceglia Miller, Stephen P Christiansen, Erick D Bothun, Ann Holleschau, Jason Jedlicka, Patricia Winters, Jacob Lang, Elias I Traboulsi, Susan Crowe, Heather Hasley Cimino, Kimberly G Yen, Maria Castanes, Alma Sanchez, Shirley York, David T Wheeler, Ann U Stout, Paula Rauch, Kimberly Beaudet, Pam Berg, Scott R Lambert, Amy K Hutchinson, Lindreth G DuBois, Rachel Robb, Marla J Shainberg, Edward G Buckley, Sharon F Freedman, Lois Duncan, B W Phillips, John T Petrowski, David Morrison, Sandy Owings, Ron Biernacki, Christine Franklin, David A Plager, Daniel E Neely, Michele Whitaker, Donna Bates, Dana Donaldson, Stacey Kruger, Charlotte Tibi, Susan Vega, David R Weakley, David R Stager Jr, Joost Felius, Clare Dias, Debra L Sager, Todd Brantley, Robert Hardy, Eileen Birch, Ken Cheng, Richard Hertle, Craig Kollman, Marshalyn Yeargin-Allsopp, Cyd McDowell, Donald F Everett, Allen Beck
Abstract
Objective: To report the accuracy of intraocular lens (IOL) power calculations and the early refractive status in pseudophakic eyes of infants in the Infant Aphakia Treatment Study.
Methods: Eyes randomized to receive primary IOL implantation were targeted for a postoperative refraction of +8.0 diopters (D) for infants 28 to 48 days old at surgery and +6.0 D for those 49 days or older to younger than 7 months at surgery using the Holladay 1 formula. Refraction 1 month after surgery was converted to spherical equivalent, and prediction error (PE; defined as the calculated refraction minus the actual refraction) and absolute PE were calculated. Baseline eye and surgery characteristics and A-scan quality were analyzed to compare their effect on PE.
Main outcome measures: Prediction error.
Results: Fifty-six eyes underwent primary IOL implantation; 7 were excluded for lack of postoperative refraction (n = 5) or incorrect technique in refraction (n = 1) or biometry (n = 1). Overall mean (SD) absolute PE was 1.8 (1.3) D and mean (SD) PE was +1.0 (2.0) D. Absolute PE was less than 1 D in 41% of eyes but greater than 2 D in 41% of eyes. Mean IOL power implanted was 29.9 D (range, 11.5-40.0 D); most eyes (88%) implanted with an IOL of 30.0 D or greater had less postoperative hyperopia than planned. Multivariate analysis revealed that only short axial length (<18 mm) was significant for higher PE.
Conclusions: Short axial length correlates with higher PE after IOL placement in infants. Less hyperopia than anticipated occurs with axial lengths of less than 18 mm or high-power IOLs. Application to Clinical Practice Quality A-scans are essential and higher PE is common, with a tendency for less hyperopia than expected.
Trial registration: clinicaltrials.gov Identifier: NCT00212134.
Figures
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Figure 3
Prediction error (PE) in relation…
Figure 3
Prediction error (PE) in relation to axial length and IOL power. The solid…
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- Multicenter Study
- Randomized Controlled Trial
- Cataract Extraction*
- Cataract* / congenital
- Child, Preschool
- Follow-Up Studies
- Humans
- Hyperopia / prevention & control*
- Infant
- Lens Implantation, Intraocular / instrumentation
- Lens Implantation, Intraocular / methods*
- Lenses, Intraocular*
- Postoperative Complications / prevention & control*
- Predictive Value of Tests
- Refractometry
- Visual Acuity
- ClinicalTrials.gov/NCT00212134
![Figure 3](https://www.ncbi.nlm.nih.gov/pmc/articles/instance/3329400/bin/nihms367398f3.jpg)
Source: PubMed