A model of the axial change in ocular parameters of the guinea pig eye from 2 to 825 days of age was developed and a corresponding paraxial schematic eye model applicable from 2 to 100 days of age was constructed. Axial distances increased logarithmically over time except for the lens in which growth was more complex. Over the first 30 days, ocular elongation was approximately linear: ocular le...

Purpose: The lockdown due to the COVID-19 pandemic lead many countries implementing a population lockdown. This study was designed investigate myopic changes that occurred during COVID19 in Pakistan. Methods: A prospective, cross-sectional study, conducted on patients presenting out-patients department with symptoms suggesting refractive problem. Subjects Mean Spherical Equivalent (MSE) level o...

Purpose: To evaluate the influence of pupil dilation on ocular parameters measured by optical biometry and intraocular lens (PC IOL) power calculation using third-generation (SRK/T) fourth-generation (Haigis) formula. Methods: 40 eyes patients indicated for cataract surgery were included in this study. Each patient was examined biometer firstly without artificial mydriasis (AM) then after AM, w...

INTRODUCTION Hepatocyte growth factor (HGF) and hepatocyte growth factor receptor (C-MET) genes have previously been reported to be associated with myopia in Asian family-based and case-control association studies, respectively. We examined whether these genes were associated with myopia in a Caucasian family dataset biased towards high myopia. METHODS Participating families had at least one ...

Naturally occurring (idiopathic) astigmatism is frequent, with up to 95% of eyes having detectable astigmatism. It is estimated that approximately 70% of the general cataract population has at least 1.00 D of astigmatism, and approximately 33% of patients undergoing cataract surgery are eligible for treatment of preexisting astigmatism.1,2 Today, cataract surgery is regarded as a refractive sur...

Purpose: The purpose of our study is to compare the average peripapillary retinal nerve fibre layer thickness by cirrus HD-Optical coherence tomography in emmetropic, axial myopic and hyperopic cases. Materials And Methods: Total 120 subjects aged between 10 50 years were enrolled this study, divided into 3 groups with 40 each, namely group 1 - emmetropia, 2- myopia >2.5 D 3-hypermetropia&gt...

In Brief Purpose: To assess whether small-incision lenticule extraction (SMILE) for high myopia reduces the binocular visual function assessed by stereoacuity, acuity, contrast sensitivity, and summation. Setting: University hospital. Design: Prospective case series. Methods: Patients with a myopic spherical equivalent of at least 6.00 diopters (D) scheduled SMILE aimed emmetropia were included...