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New paper: Reappraisal of the historical myopia epidemic in native Arctic communities

In the 1950’s Indigenous Arctic communities saw a spectacular rise in myopia prevalence, which was attributed to changes in their way of life and the introduction of formal eduction. Children were forced to attend ‘residential schools’ in an aggressive program of deculturalization, where they expe…

New paper: Forecasting progressive trends in keratoconus by means of a time delay neural network

Early and accurate detection of keratoconus progression is particularly important for the prudent, cost-effective use of corneal cross-linking and proper timing of clinical follow-up visits. This study assesses whether keratoconus progression could be predicted based on two prior tomography measure…

New paper: Influence of the eye globe design on biomechanical analysis

In vivo biomechanical analyses of the anterior segment often only consider a simplified layout of the eye, without much consideration for the mechanical contributions of the inner eye components on the corneal deformation.Through finite element analysis, this work demonstrates that the lens, iris, …

New article: Determining the Most Suitable Tomography-Based Parameters to Describe Progression in Keratoconus

Not every corneal tomography parameter is equally suited to follow-up the progression of keratoconus. This work judges the parameters provided by the Pentacam by their repeatability in different degrees of the disease, consistency between patients, and monotonicity during progression to come to an …

New article: Estimating principal plane positions for ocular power calculations in children and adults

As lens biometry is still difficult to obtain, authors may be inclined to make assumptions about the principal plane positions in the eye. The assumed values are usually based on the proportions of adult eye models, but these may be quite unsuitable for use in children's eyes. To this end, the …

Flemish Day of Science 2020

It's always a fun challenge to present your work in simple terms to an audience of children...

New paper: Scheimpflug Densitometry in Keratoconus: A New Method of Visualizing the Cone

Marta Jiménez García recently discovered that manifest keratoconus often goes accompanied by a bright region in the corneal densitometry that extends over the entire depth of the cornea. This may be a new way to delineate the region affected by biomechanical weakening.

Jiménez-García M, Ní Dhubhghai…

New paper: Age‐related axial length changes in adults: a review

Many cross-sectional studies on axial length reproted an age-related decrease that is physiologically difficult to explain. This analysis explores the possible origins of these observations and found that they are associated with gradual changes in increased body length and education level.

Rozema J…

New article: Repeatability of the Pentacam HR in Various Grades of Keratoconus

To understand the relative importance of tomographic indices of the Pentacam in the follow-up of keratoconus, we looked at their repeatability for varying stages of the disease, as well as for normal eyes. Maximum anterior curvature, often used in keratoconus follow-up, has a variability larger tha…

New article: Baseline findings in Retrospective Digital Computer Analysis of Keratoconus Evolution (REDCAKE) project

This work is the first of a series of papers to discuss the reults of the Retrospective Digital Computer Analysis of Keratoconus Evolution (REDCAKE), beginning with the baseline analysis for a large cohort of keratoconus patients. It looks at how the stage of the disease affects the cone curvature …

New article: Logistic index for keratoconus detection and severity scoring (Logik)

Knowing the stage of a keratoconic cornea is essential for progression follow-up and the choice of treatment. Proper staging can be challenging, however, since many of the available parameters are inadequate to the task (e.g. K_max and Pachy_min). This inspired us to develop the Logistic Index for…

Ikram graduated from H Impact

Ikram successfully graduated from the H Impact program at the Ghent University, which promotes innovation and entrepreneurship in health care. She was part of the EyeOnCancer team, who pitched their ideas about a platform to provide customized advice for cancer patients.

See how your straylight affects your driving ability

Volantis is looking for volunteers to participate in a study on the relationship between straylight and driving ability in a real driving simulator. Do you have your drivers license and are you willing to go to Hasselt for the testing? Then please contact us for more information.

New article: Differences in ocular biometry between urban and rural children matched by refractive error: the Shandong Children Eye Study

Using the data from the Shandong Children Eye Study, we established that children living in the countryside and those living in cities have fundamentally different eye structure, despite having the exact same refraction. Mediation analysis demonstrated that this difference is associated with the w…

Ikram receives H Impact scholarship

Ikram has received a scholarship to attend the prestigious H Impact Health Innovation & Entrepreneurship Program!

New article: Axial Growth and Lens Power Loss at Myopia Onset in Singaporean Children

This work studies the  biometry changes before and after myopia onset in the Singapore Cohort Study of the Risk Factors for Myopia (SCORM). At myopia onset, the myopic shift increased to 0.50 diopters per year or more in new myopes compared to the minor changes in emmetropes of the same age. New m…

New article: Computer aided diagnosis for suspect keratoconus detection

Our lab developed a new, stable and low-cost computer aided diagnosis system for early keratoconus detection. This system combines a custom-made mathematical model, a feedforward neural network and a Grossberg-Runge Kutta architecture to detect clinical and suspect keratoconus. It is able to detect…

New article: The components of adult astigmatism and their age-related changes

Refractive astigmatism gradually changes from with-the-rule (WTR) towards against-the-rule (ATR) with age. This work studies the underlying corneal and internal changes using the refractive and corneal biometry data 1195 healthy Caucasian subjects, expressed in power vectors. The refractive power …

New article: Average biometry of the cornea in a large population of Iranian school children

This work establishes the average Scheimpflug corneal tomography for a population of 4953 healthy Iranian primary school children. These data were transformed to determine the corneal position and orientation in three-dimensional space, followed by a model fit that combines a biconic with a Zernik…

Sarah at PRESS > SPEAK

Today Sarah presented her work at PRESS > SPEAK, a science presentation competition at the UAntwerpen to train young investigators to clearly and briefly explain their research to a non-expert audience.

Happy Holidays!

New paper: Introduction to Machine Learning for Ophthalmologists

New diagnostic and imaging techniques generate such an incredible amount of data that it is often a challenge to extract all information that could be possibly useful in clinical practice. This work reviews the latest achievements of Machine Learning in ocular sciences and provides a comprehensive…

Sarah Hershko and Marta Jiménez García joined Volantis

Two new PhD students have joined Volantis. Sarah Hershko will investigate the relationship between retinal straylight and driving capacity, while Marta Jiménez García will work on forecasting the progression of keratoconus to improve the current treatment protocols.

New article: In vivo anterior scleral morphometry, axial length and myopia

This work reports on the relatively strong correlations between anterior scleral morphometry and axial length, and consequently to the refractive state of the eye in myopes and emmetropes. The refractive state of each patient should therefore be taken into consideration when analysing scleral …