Pre- and postoperative examination included uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), corneal topography simulated K average readings (K ave.), apical curvature (AK), and surface aberrometry
(coma aberration) by CSO EyeTop Topographer (Costruzione Strumenti Oftalmici, Florence, Italy).
results are calculated via a Hartmann-Shack sensor, which bases its measurements on Fourier algorithms.
describes the optical properties of the eye in individual Zernike polynomials.
A complete ophthalmological examination was carried out preoperatively, which included measurement of manifest refraction, uncorrected (UDVA) and corrected distance visual acuity (CDVA), Goldmann applanation tonometry, anterior segment slit-lamp examination, corneal topography and aberrometry
with the Sirius system (Costruzioni Strumenti Oftalmici, CSO, Florence, Italy), biometry (IOL Master v.4.3, Carl Zeiss Meditec, Jena, Germany), and eye fundus examination.
In the last 10 years, there has been a huge progress in our understanding of corneal disorders due to the availability of new in vivo imaging techniques, such as confocal microscopy, optical coherence tomography, corneal topography, or aberrometry
. Recent advances in treatment methods include new cellular and medical, topical therapy with new biotechnology agents and novel treatment methods of keratoconus as well as further improvement of keratoplasty procedures.
Table 3: Postoperative comparison of ocular (whole eye) aberrometry
and optical quality of consecutive eyes that underwent deep anterior lamellar keratoplasty (fluid dissection) or penetrating keratoplasty for keratoconus.
Jimenez, "Corneal biomechanics, refraction, and corneal aberrometry
in keratoconus: an integrated study," Investigative Ophthalmology & Visual Science, vol.
Before ICRS implantation, patients had a complete ophthalmologic examination including uncorrected (UDVA) and best-corrected (CDVA) distance visual acuity (ETDRS charts), manifest and cycloplegic refractions, keratometry, corneal topography (Sirius tomographer, CSO, Italy), corneal aberrometry
(Sirius tomographer, CSO, Italy), anterior segment optical coherence tomography (Visante Zeiss-Meditec, Germany), endothelial cell count, ultrasonic pachymetry, slit-lamp microscopy, Goldmann applanation tonometry, and binocular indirect ophthalmoscopy.
LASIK involves wavefront (aberrometry
) guided excimer laser corneal reshaping (www.visx.com) beneath a protective corneal flap which is replaced at the end of surgery.
Any topic of relevance to clinical contact lens and anterior eye practice may be covered--topics at the 2008 Clinical Conference included complex lens fitting, contact lenses in sport, and topography and aberrometry
. Presenters are entitled to complimentary conference registration (up to two per presentation--auxiliary clinical tutors may be provided in order to meet General Optical Council requirements) and an expenses grant of 150 [pounds sterling] per presentation will be payable.
Anterior segment tomography (Pentacam HR, Oculus, Wetzlar, Germany) and wavefront aberrometry
(KR-1W, Topcon, Tokyo, Japan) were performed before and after mydriasis.