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Publications (38)
Purpose:
To assess the effectiveness and safety of the "hydro-fluorescein" adjunct technique for primary pterygium removal.
Design/methods:
A non-randomized prospective study was conducted for various types of pterygium excision with superior bulbar conjunctival autograft (CAG) and fibrin glue. We introduced fluorescein staining to ensure thorou...
Background: Flap creation during laser refractive surgery restructures the anterior cornea, particularly the stroma, reducing the keratocyte cell density (KCD). This reduced density makes it challenging to completely regenerate to the presurgical phase. The aim of the present study was to investigate the effects of two types of artificial tear (AT)...
Background: Artificial tears (ATs) are widely used in ophthalmic practice with various formulations, mainly as a treatment for dry eye, owing to their rapid ability to alleviate the signs and symptoms of this condition. We aimed to investigate drop comfort and subjective ocular symptoms after instillation of the following ATs with different physica...
Due to pterygium tissue compression on the corneal surface, it has been hypothesised that the degree of corneal astigmatism caused by pterygium can vary. This study aims to develop a freeze-dried method for estimating net pterygium tissue mass (NPTM) as dry weight. A single surgeon (KMK) excised 60 primary pterygium using the controlled partial avu...
Introduction:
Early detection of visual symptoms in pterygium patients is crucial as the progression of the disease can cause visual disruption and contribute to visual impairment. Best-corrected visual acuity (BCVA) and corneal astigmatism influence the degree of visual impairment due to direct invasion of fibrovascular tissue into the cornea. Ho...
Introduction: Precise pupillometry is crucial to determine ablation optical zone (OZ) size selection in LASIK. Significant difference in the selection induces unwanted postoperative night visual disturbance. Placido-disc topographer and Hartmann-Shack aberrometer are commonly used in LASIK preoperative assessment. However, little is known on the pr...
A 68-year-old Malay male with no known medical illness presented with progressive growth of right conjunctival mass over a few months. Anterior segment examination of the right eye showed an inferior perilimbal elevated gelatinous conjunctival mass measuring 6 mm vertically x 14 mm horizontally with 360° corneal vascularisation. Excision biopsy and...
Introduction: Different polymers used in artificial tear formulations influence their physical properties, such as viscosity and pH, hence affecting their bioavailability. There is limited data available from manufacturers specifying the physical properties of artificial tears, even though these data can contribute to their efficacyand effectivenes...
Post-myopic laser refractive surgery corneal power measurement for intraocular lens power calculation is one of the most challenging issues in cataract surgery. Standard keratometry measurement is likely to be overestimated which could lead to false-low intraocular lens power. As a result, this can lead to hyperopic surprise. Contact lens method is...
Background: This study aimed to evaluate the pterygium recurrence rate and corneal stabilization point after pterygium excision via the controlled partial avulsion fibrin glue technique using multiple corneal parameters.
Methods: One hundred eyes of 100 patients who had undergone primary pterygium excision surgery via the controlled partial avulsi...
Introduction: To propose an objective method of quantifying pterygium fibroconnective components utilizing freeze-dried method. Methods: 60 primary pterygium were excised using controlled partial avulsion technique performed by a single surgeon (KMK), and divided into two groups: formalin-fixed (n=30) and fresh (n=30). Initially, each sterile conta...
Introduction: To propose an objective method of quantifying pterygium thickness using AS-OCT. Methods: Anterior segment imaging was performed using Enhanced High Resolution Corneal (EHRC) of Visante™ OCT in 68 primary pterygium eyes. Prior to imaging, corneal topography assessment was performed on each pterygium eye in order to identify its topogra...
Introduction: To propose an objective method of quantifying pterygium total area utilizing image analysis method. Methods: 68 primary pterygium participants were selected from patients who visited an ophthalmology clinic. We adopted image analysis software in calculating the size of invading pterygium to the cornea. The marking of calculated area w...
Pterygium are known to cause reduction in oculovisual function. However, the effects are varying due to its various morphological factors, thus, the impact on patient are difficult to predict which indirectly not all pterygium need to be excised. To describe the effects of different types of pterygium on changes in oculovisual function. Ninety-thre...
Introduction: Detailed-documentation of phacoemulsification surgical techniques in operative note is not a routine in clinical practice. However, this information is crucial in order to quantify the variations in surgeon's surgical technique and to further evaluate the surgeon's surgically induced astigmatism (SIA) predictability. Aim: To assess th...
Introduction: Photorefractive keratometry (PRK) and laser in situ keratomileusis (LASIK) are among the many types of laser refractive surgery available for the correction of myopic astigmatism. The outcome of the procedure can be affected by several parameters which include patient's age, optical zone diameter, epithelial hyperplasia, preoperative...
Introduction: Dryweight in pterygium is more towards the fleshy appearance of the fibrous tissue. Aim: The goal of this study was to determine the predictive ability of net pterygium tissue mass (dryweight) on predicting changes in anterior corneal curvature and oculovisual functions relative to pterygium types. Methodology: A total of 93 primary p...
Introduction: Accurate corneal wavefront aberration measurements are essential in determining patient’s suitability, vision outcomes and patient satisfaction in laser refractive surgeries. This study aimed to evaluate the reliability measurement of higher-order aberration (HOA) using corneal videokeratograph Atlas 9000. Materials and method: 38 eye...
Introduction: This study aimed to evaluate the short-term efficacy of artificial tears (AT) instillation on tear film quality and quantity utilising two dual polymer artificial tears; Systane Hydration preservative (SH) and non-preservative (SHUD) in 60 minutes observation period compared to normal saline. Materials and methods: One hundred eyes of...
As cataract surgery has evolved over 50 years, there have been changes in the current clinical ophthalmic practice to improve safety and efficacy in order to achieve perfect postoperative outcomes. Since the 1990s, technological advances such as ocular biometry, phacoemulsification, and intraocular lens (IOL) formulas, as well as many others, have...
Phacoemulsification surgical techniques are associated with surgically induced astigmatism (SIA) in post-cataract surgery. However, no established tool is currently available to gather information on the surgeon's phacoemulsification techniques. This study aimed to validate a newly developed ‘Phacoemulsification Techniques Related to Surgically Ind...
Purpose:
To compare the surgically induced astigmatism (SIA) values and the analysis report of five different SIA calculators.
Methods: Data from 80 eyes of 72 subjects who underwent uneventful phacoemulsification surgery by four different surgeons were analysed. Surgical data, preoperative and postoperative K-readings were taken and used for th...
Purpose:
To describe an objective method to accurately quantify corneo-pterygium total area (CPTA) by utilising image analysis method and to evaluate its association with corneal astigmatism (CA).
Methods:
120 primary pterygium participants were selected from patients who visited an ophthalmology clinic. We adopted image analysis software in cal...
Introduction: Corneal curvature (CC) is an important anterior segment parameter. This study compared CC measurements conducted with two optical devices in pterygium eyes. Methods: Sixty pterygium eyes of 30 patients were enrolled in this study. CC was measured three times with the optical biometer and topography-keratometer Tomey OA-2000 (Tomey Cor...
Introduction: There was no previous study to assess relationship between dry eye symptoms and signs in the local population. The purpose of this study is to evaluate the relationship of symptomatic assessment and clinical signs of dryness in dry eye subjects. Materials and method: A Cross-sectional study with convenient sampling involving 321 subje...
Introduction: Purpose of this study was to evaluate the inter-device agreement of ocular and corneal higher-order aberration measurements using various aberrometers. Materials and method: Ocular and corneal higher-order aberrations were measured from 57 eyes. For ocular aberration, the measurements were obtained from WASCA Analyzer (Carl Zeiss Medi...
Introduction: Corneal power or keratometric value represents two-third of total refractive power of the eye. It is an important parameter in intraocular lens calculation. Purpose of the study was to evaluate repeatability and agreement of keratometric measurements obtained from a six points-based keratometry device; IOLMaster 500 (Carl Zeiss Medite...
Purpose: The goal of this study was to predict visual acuity (VA) and contrast sensitivity function (CSF) with tissue redness grading after pterygium surgery.
Materials and methods: A total of 67 primary pterygium participants were selected from patients who visited an ophthalmology clinic. We developed a semi-automated computer program to measure...
This research work outlines the methodology of a medical image grading system based on supervised learning algorithm. A total of 210 features were extracted in various color spaces and most relevant features were identified and fed into a regularized feedforward neural network. The inter-grader reliability of the supervised system was then assessed...
In the absence of ground truth, scores from many graders are required to obtain good representation of a clinical grading. The internet enables quick feedback from the experts at the comfort of their home or office. In this study, we demonstrated the use of online form as a tool to get quick feedback from clinicians on clinical grading of pterygium...
Information obtained from redness grading can assist clinician for diagnosis and in making clinical decision. This research work aims to mimic human perception of fibrovascular redness using features extracted from color entropy. Gaussian process regression with the radial basis function kernel has been employed to fuse relevant features and establ...
GLCM texture features have been widely used to characterize biomedical images. Most of the previous studies using GLCM features to characterize biomedical images only consider single or limited color space due to the use of only one color model. To mimic human color perception, conventional RGB color model may need to be supplemented with other col...
Video analysis of the dynamics of the tear meniscus height (TMH) have been used in the diagnosis of dry eye. However, the existing techniques require substantial manual intervention. This research work aims to automate the process of estimating the change in the inferior TMH without manual intervention.
