title: Sulcus anatomy and diameter in pseudophakic eyes and correlation with biometric data: evaluation with a 50 MHz ultrasound biomicroscope.
abstract: OBJECTIVE
  To evaluate the sulcus anatomy and possible correlations between sulcus diameter and white-to-white (WTW) diameter in pseudophakic eyes, data that may be important in the stability of add-on intraocular lenses (IOLs).
  
  
  METHODS
  University Eye Hospital, Tuebingen, Germany.
  
  
  METHODS
  Case series.
  
  
  METHODS
  In pseudophakic eyes, the axial length (AL) and horizontal WTW were measured by the IOLMaster device. Cross-sectional images were obtained with a 50 MHz ultrasound biomicroscope on the 4 meridians: vertical, horizontal (180 degrees), temporal oblique, and nasal oblique. Sulcus-to-sulcus (STS), angle-to-angle (ATA), and sclera-to-sclera (ScTSc) diameters were measured. The IOL optic diameter (6.0 mm) served as a control. To test reliability, optic measurements were repeated 5 times in a subset of eyes.
  
  
  RESULTS
  The vertical ATA and STS diameters were statistically significantly larger than the horizontal diameter (P=.0328 and P=.0216, respectively). There was no statistically significant difference in ScTSc diameters. A weak correlation was found between WTW and horizontal ATA (r = 0.5766, P<.0001) and between WTW and horizontal STS (r = 0.5040, P=.0002). No correlation was found between WTW and horizontal ScTSc (r = 0.2217, P=.1217).
  
  
  CONCLUSIONS
  The sulcus anatomy had a vertical oval shape with the vertical meridian being the largest, but it also had variation in the direction of the largest meridian. The WTW measurements showed a weak correlation with STS. In pseudophakic eyes, Soemmerring ring or a bulky haptic may affect the ciliary sulcus anatomy.
authors.affiliation: University Eye Hospital, Centre for Ophthalmology, Eberhard-Karls University, Tuebingen, Germany. katrin.petermeier@med.uni-tuebingen.de
authors.forename: Katrin
authors.initials: K
authors.lastname: Petermeier
authors.forename: Daniela
authors.initials: D
authors.lastname: Suesskind
authors.forename: Elke
authors.initials: E
authors.lastname: Altpeter
authors.forename: Andreas
authors.initials: A
authors.lastname: Schatz
authors.forename: André
authors.initials: A
authors.lastname: Messias
authors.forename: Florian
authors.initials: F
authors.lastname: Gekeler
authors.forename: Peter
authors.initials: P
authors.lastname: Szurman
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D058452:Axial Length, Eye / Q000033:anatomy & histology; D001699:Biometry; D002924:Ciliary Body / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D008297:Male; D033401:Microscopy, Acoustic; D008875:Middle Aged; D018918:Phacoemulsification; D019591:Pseudophakia / Q000000981:diagnostic imaging*; D012590:Sclera / Q000033:anatomy & histology