[Measurement of lens density with a Scheimpflug camera in diabetic patients].

نویسندگان

  • P Beneyto
  • M Ibáñez
  • M A Leal
  • A García
  • M Cabezas
  • P Morente
چکیده

OBJECTIVE To assess if diabetes, in patients without cataracts or diabetic retinopathy, alters the densitometric values of the lens and to what degree this occurs. METHODS A total of 93 patients, divided into two groups, were studied: the diabetic patients had a visual acuity equal to or greater than 0.8 and normal eye funduscopy, and the control group consisted of healthy patients of a similar age. Measurements in all patients were made with the Scheimpflug camera and the lens density of the anterior capsule, anterior cortex and nucleus was defined. The values obtained in the two groups were compared by analysis of variance (ANOVA). RESULTS All densitometric values were greater in the diabetic patients than in the normal controls. The greatest difference was seen in the values of the anterior capsule, followed by the nucleus and cortex. The differences approached statistical significance (P=0.07) only in the case of the anterior capsule. CONCLUSIONS Diabetes increases densitometric values of the anterior capsule and to a lesser degree of the anterior cortex. However, further studies are necessary to verify if this alteration is of significance.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Lens Densitometry after Corneal Cross-linking in Patients with Keratoconus Using a Scheimpflug Camera

PURPOSE To evaluate changes in crystalline lens densitometry following corneal cross-linking (CXL) in keratoconic patients. METHODS In a quasi-experimental study, three-dimensional lens densitometry was performed using the Pentacam Scheimpflug camera (Oculus Optikgerate GmbH, Wetzlar, Germany) at baseline and six months after CXL. Densitometry was performed in a fixed area of 2 inch × 1 inch ...

متن کامل

مقایسه‌ی کراتومتری پنتاکم وکراتومتری IOL Master در محاسبه‌ی لنز داخل چشمی افراد با قرنیه‌ی طبیعی

Background and Objective: Proper method and machine for corneal evaluation is an important factor in many anterior segment interventions. This study was performed to compare the mean keratometry (K) readings obtained with an IOL Master and Pentacam for intraocular lens power calculation in normal subjects with no history of refractive surgery. Materials and Methods: Mean K values were obtained ...

متن کامل

Scheimpflug lens densitometry and ocular wavefront aberrations in patients with mild nuclear cataract.

PURPOSE To test correlations between Scheimpflug optical densitometry and ocular higher-order aberrations (HOAs) in patients with mild nuclear cataract. SETTING Cornea and Refractive Surgery Department, Hospital de Braga, Braga, Portugal. DESIGN Retrospective single-center study. METHODS In eyes with mild nuclear cataract, lens densitometry was evaluated by Scheimpflug imaging (Pentacam H...

متن کامل

Pentacam Scheimpflug quantitative imaging of the crystalline lens and intraocular lens.

PURPOSE To implement geometrical and optical distortion correction methods for anterior segment Scheimpflug images obtained with a commercially available system (Pentacam, Oculus Optikgeräte GmbH). METHODS Ray tracing algorithms were implemented to obtain corrected ocular surface geometry from the original images captured by the Pentacam's CCD camera. As details of the optical layout were not...

متن کامل

Geometric model of image formation in Scheimpflug cameras

We present a geometric model of image formation in Scheimpflug cameras that is most general. Scheimpflug imaging is commonly used is scientific and medical imaging either to increase the depth of field of the imager or to focus on tilted object surfaces. Existing Scheimpflug imaging models do not take into account the effect of pupil magnification (i.e. the ratio of the exit pupil diameter to t...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Archivos de la Sociedad Espanola de Oftalmologia

دوره 82 3  شماره 

صفحات  -

تاریخ انتشار 2007