June 2013
Volume 54, Issue 15
Free
ARVO Annual Meeting Abstract  |   June 2013
Cornea, crystalline lens and whole ocular refractive power in premature infants with retinopathy of prematurity at one year of age
Author Affiliations & Notes
  • Takako Tachikawa
    ophthalmology, Tokyo Metropolitan Ohtsuka Hospital, Tokyo, Japan
    ophthalmology, Tokyo Women's Medical University, Medical Center East, Tokyo, Japan
  • Ritsuko Ueno
    ophthalmology, Tokyo Metropolitan Ohtsuka Hospital, Tokyo, Japan
  • Daisuke Yuzurihara
    ophthalmology, Tokyo Metropolitan Ohtsuka Hospital, Tokyo, Japan
  • Tetsuko Mita
    ophthalmology, Tokyo Metropolitan Ohtsuka Hospital, Tokyo, Japan
  • Osamu Katsumi
    ophthalmology, Tokyo Metropolitan Ohtsuka Hospital, Tokyo, Japan
    ophthalmology, Nishikasai Inouye Eye Clinic, Tokyo, Japan
  • Toru Noda
    ophthalmology, Tokyo Women's Medical University, Medical Center East, Tokyo, Japan
    ophthalmology, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
  • Kazuhiko Ohnuma
    Medical System Engineering, Chiba University, Chiba, Japan
  • Footnotes
    Commercial Relationships Takako Tachikawa, None; Ritsuko Ueno, None; Daisuke Yuzurihara, None; Tetsuko Mita, None; Osamu Katsumi, None; Toru Noda, None; Kazuhiko Ohnuma, None
  • Footnotes
    Support None
Investigative Ophthalmology & Visual Science June 2013, Vol.54, 590. doi:
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Takako Tachikawa, Ritsuko Ueno, Daisuke Yuzurihara, Tetsuko Mita, Osamu Katsumi, Toru Noda, Kazuhiko Ohnuma; Cornea, crystalline lens and whole ocular refractive power in premature infants with retinopathy of prematurity at one year of age. Invest. Ophthalmol. Vis. Sci. 2013;54(15):590.

      Download citation file:


      © ARVO (1962-2015); The Authors (2016-present)

      ×
  • Supplements
Abstract

Purpose: To investigate the corneal, crystalline lens, and whole ocular refractive powers in premature 1-year-old infants with retinopathy of prematurity (ROP) using a method we devised to determine the refractive power in infants.

Methods: We studied 50 eyes (50 infants with ROP; overall mean gestational age, 25.3±1.9 weeks; range, 22-29; mean birth weight, 763.3±195.5 g; range, 438-1,230) at 1 year corrected age. The patients were divided into 3 primary groups: group 1, 29 untreated eyes; group 2, 9 treated eyes (zone I and aggressive posterior ROP (APROP)); and group 3, 12 treated eyes (zone II). The spherical equivalent (SE), anterior chamber depth (ACD), axial length (AL), corneal radius (CR), and lens thickness (LT) were measured by ultrasound A-scan biometry, autorefractometry, and keratometry under cycloplegia. The individual refractive index using the Gullstrand-Emsley model (except that of the lens, which was modified to 1.43) and anterior and posterior lens curvature ratio (1.29) were used to calculate the corneal power (CP), crystalline lens power (LP) and whole ocular refractive power (WP). The parameters were compared among groups by the Student’s t-test and Tukey HSD test.

Results: The average group 1 values were AL, 19.81±0.74 mm; CR, 7.44±0.32 mm; LT, 3.85±0.14 mm; ACD, 3.05±0.38 mm; SE, +0.56±1.10 diopters (D); CP, 45.20 D; LP, 39.01 D; and WP, 76.66 D. Group 2: AL, 18.79±0.57 mm; CR, 7.22±0.33 mm; LT, 4.32±0.22 mm; ACD, 2.23±0.35 mm; SE, -2.49±1.56 D; CP, 46.45 D; LP, 45.88 D; and WP, 84.06 D. Group 3: AL, 19.65±0.86 mm; CR, 6.88±0.24 mm; LT, 4.11±0.16 mm; ACD, 2.77±0.34 mm; SE, -0.75±2.32 D; CP, 45.12 D; LP, 41.52 D; and WP, 78.79 D. The SE differences between groups 1 and 2 were significant (p=0.041) but not between groups 1 and 3 (p=0.19). The CP differences among the 3 groups were not significant (p>0.2). The LPs differed significantly (p<0.05) among groups. The WPs differed significantly (p<0.0001) between groups 1 and 2 but not between groups 1 and 3 (p=0.11).

Conclusions: In premature 1-year-old infants with ROP, there was no significant difference between the group not treated with laser and zone II laser-treated group in SE and WP. Zone I and APROP laser-treated groups had higher myopia and greater WP than other groups.

Keywords: 706 retinopathy of prematurity • 578 laser • 605 myopia  
×
×

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.

×