title: [Clinical results of the aspheric intraocular lens FY-60AD (Hoya) with particular respect to decentration and tilt].
abstract: BACKGROUND
  Aspheric intraocular lenses (IOLs) aim to improve visual function and particularly contrast vision by neutralizing spherical aberration. One drawback of such IOLs is the enhanced sensitivity to decentration and tilt, which can deteriorate image quality.
  
  
  METHODS
  A total of 30 patients who received bilateral phacoemulsification before implantation of the aspheric lens FY-60AD (Hoya) were included in a prospective study. In 25 of the patients (50 eyes) the following parameters could be assessed 3 months after surgery: visual acuity, refraction, contrast sensitivity, pupil size, wavefront errors and decentration and tilt using a newly developed device.
  
  
  RESULTS
  The functional results were very satisfying and comparable to results gained with other aspheric IOLs. The mean refraction was sph + 0.1 D (±0.7 D) and cyl 0.6 D (±0.8 D). The spherical equivalent was −0.2 D (±0.6 D). Wavefront measurements revealed a good compensation of the corneal spherical aberration but vertical and horizontal coma also showed opposing values in the cornea and IOL. The assessment of the lens position using the Purkinje meter demonstrated uncritical amounts of decentration and tilt. The mean amount of decentration was 0.2 mm±0.2 mm in the horizontal and vertical directions. The mean amount of tilt was 4.0±2.1° in horizontal and 3.0±2.5° in vertical directions.
  
  
  CONCLUSIONS
  In a normal dioptric power range the aspheric IOL FY-60AD compensates the corneal spherical aberration very well with only minimal decentration. The slight tilt is symmetrical in both eyes and corresponds to the position of the crystalline lens in young eyes. This may contribute to our findings of compensated corneal coma.
authors.affiliation: Augenklinik des Knappschaftskrankenhauses, An der Klinik 10, 66280 Sulzbach. sek-augen@kksulzbach.de
authors.forename: U
authors.initials: U
authors.lastname: Mester
authors.forename: S
authors.initials: S
authors.lastname: Heinen
authors.forename: H
authors.initials: H
authors.lastname: Kaymak
mesh_terms: D000368:Aged; D019544:Equipment Failure Analysis; D005260:Female; D006801:Humans; D007910:Lenses, Intraocular; D008297:Male; D011474:Prosthesis Design; D012030:Refractive Errors / Q000175:diagnosis* / Q000534:rehabilitation*; D016896:Treatment Outcome
references.citation: Opt Lett. 2007 Feb 15;32(4):406-8
references.pmid: 17356668
references.citation: J Refract Surg. 2005 Sep-Oct;21(5):S541-6
references.pmid: 16209458
references.citation: J Cataract Refract Surg. 2009 Jan;35(1):172-81
references.pmid: 19101441
references.citation: J Vis. 2004 Apr 16;4(4):262-71
references.pmid: 15134473
references.citation: Opt Express. 2007 Mar 5;15(5):2204-18
references.pmid: 19532456
references.citation: Am J Ophthalmol. 2005 Dec;140(6):1051-8
references.pmid: 16376650
references.citation: Invest Ophthalmol Vis Sci. 2008 May;49(5):2216-22
references.pmid: 18436854
references.citation: Br J Ophthalmol. 1998 Apr;82(4):419-22
references.pmid: 9640193
references.citation: J Cataract Refract Surg. 2006 Jan;32(1):72-7
references.pmid: 16516782
references.citation: J Cataract Refract Surg. 2003 Apr;29(4):652-60
references.pmid: 12686231
references.citation: J Cataract Refract Surg. 2007 Feb;33(2):203-9
references.pmid: 17276259
references.citation: J Opt Soc Am A Opt Image Sci Vis. 2003 Oct;20(10):1841-51
references.pmid: 14570097
references.citation: J Refract Surg. 2002 Nov-Dec;18(6):683-91
references.pmid: 12458861
references.citation: J Opt Soc Am A Opt Image Sci Vis. 2006 Mar;23(3):509-20
references.pmid: 16539046
references.citation: J Opt Soc Am A Opt Image Sci Vis. 2007 Oct;24(10):3274-83
references.pmid: 17912320
references.citation: Vision Res. 1988;28(5):659-65
references.pmid: 3195069
references.citation: J Refract Surg. 2007 Apr;23(4):374-84
references.pmid: 17455833
references.citation: J Cataract Refract Surg. 2009 Mar;35(3):485-90
references.pmid: 19251142
references.citation: J Cataract Refract Surg. 2009 Jan;35(1):47-56
references.pmid: 19101424
references.citation: Vision Res. 2008 Jan;48(1):70-9
references.pmid: 18054373
references.citation: Ophthalmic Physiol Opt. 1991 Apr;11(2):137-46
references.pmid: 2062538
references.citation: Am J Ophthalmol. 2008 May;145(5):827-33
references.pmid: 18291345
references.citation: J Refract Surg. 2005 May-Jun;21(3):223-35
references.pmid: 15977879