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Assessment of binocular vision and accommodation in myopic children wearing defocus incorporated multiple segments (DIMS) spectacle lenses for 24 months

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Journal of optometry 2025年第3期18卷 100558-100558页

作者： Yahaya, Nur Adibah Mohd-Ali, Bariah Norazman, Fatin Nur Najwa Syed Mohd Dardin, Syarifah Faiza Mohamad Shahimin, Mizhanim Mohamad Fadzil, Norliza Optometry and Vision Science Programme Center for Community Health Studies (ReaCH) Faculty of Health Sciences Universiti Kebangsaan Malaysia Jalan Raja Muda Abdul Aziz Kuala Lumpur 50300 Malaysia Optometry and Vision Science Programme Centre for Rehabilitation and Special Needs Study (iCaRehab) Faculty of Health Sciences Universiti Kebangsaan Malaysia Jalan Raja Muda Abdul Aziz Kuala Lumpur 50300 Malaysia

Purpose: This study aimed to determine the changes in binocular vision (BV) and accommodation in Malay myopic children following long-term wear of Defocus Incorporated Multiple Segments (DIMS) spectacle lenses for 24 months. Methods: Twenty-three Malay myopic children aged 7–12 years were enrolled in this prospective, self-controlled study. DIMS spectacle lenses were prescribed, and analyses were conducted at baseline, 12, and 24 months. Assessments included stereopsis, near point of convergence (NPC), phoria, positive/negative fusional vergence (PFV/NFV), amplitude of accommodation (AA), accommodative lag, positive/negative relative accommodation (PRA/NRA), and accommodative convergence to accommodation (AC/A) ratio. Visual acuity (VA), cycloplegic refraction (SER) and axial length (AL) were monitored. Data were analyzed using repeated-measures analysis of variance (ANOVA) within-subject or the Friedman test, with Bonferroni correction applied. p < 0.05 was considered statistically significant. Results: Statistically significant changes were observed after 24 months, including median changes in NPC (receded by 2 cm, p < 0.001), AA (reduced by 1.67D, p = 0.002), distance PFV break (increased by 8Δ, p = 0.026) and recovery (increased by 6Δ, p = 0.033), distance NFV break (no change, p = 0.043), stereopsis (improved by 10″, p < 0.001), accommodative lag (reduced by 0.25D, p = 0.002), and AC/A ratio (increased by 1Δ/D, p < 0.001). Additionally, distance and near VA improved (p < 0.001), while SER and AL increased (p < 0.001). Conclusion: : Wearing DIMS spectacle lenses for 24 months resulted in changes in BV and accommodation while slowing myopia progression. Regular NPC monitoring is recommended to maintain optimal BV function and visual comfort in children wearing DIMS lenses. © 2025 The Author(s)

关键词： accommodation binocular vision Defocus incorporated multiple segments (DIMS) lens long-term wear Myopia progression

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Smartphone use patterns and the impact on accommodation and convergence system of the eyes among Malaysian teenagers

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International Journal of Ophthalmology(English edition) 2024年第11期17卷 2093-2099页

作者： Thilageswary Chellapan Norlaila Mat Daud Sumithira Narayanasamy Programme of Optometry and Vision Science Faculty of Health SciencesUniversiti Kebangsaan MalaysiaJalan Raja Muda Abdul Aziz 50300Kuala LumpurMalaysia

AIM:To determine the smartphone use patterns and effects of smartphone use on accommodation and convergence system of the eyes among Malaysian ***:A total of 62 participants aged between 13 and 17y were involved.A self-administered questionnaires containing 12 items was used to evaluate the smartphone usage *** was followed by an eye examination,involving a battery of accommodation and convergence assessments before and after the smartphone *** data analysis comprised descriptive statistics,paired t-test,and correlation ***:The use of smartphones is at a high level and at an optimal distance daily,with more than 6h a day watching video films,games,and completing school *** of the participants not reported eye strain factors and eye prescription changes with the use of digital *** use of a smartphone continuously for 30min was found to significantly decrease amplitude of accommodation,accommodative facility,and positive relative accommodation(P<0.001).Meanwhile,the lag of accommodation parameters and negative relative accommodation increased with the use of smartphones significantly(P<0.001).The near point of convergence(NPC)and distance and near negative fusional vergence decreased significantly(P<0.001).The NPC parameter was found to have a weak negative association with the frequency of smartphone use(R=-0.276,P<0.05).CONCLUSION:Frequent and continuous use of smartphones have increased visual stress and resulted in weakness of accommodation and vergence ***,frequent break is mandatory when using a smartphone and appropriate visual hygiene,the 20-20-20 rule(every 20min,view something 20 feet away for 20s)are required during smartphone use to maintain visual function.

关键词： smartphone use patterns accommodation and convergence visual function visual stress

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Comparison of vergence mechanisms between university students with good and poor sleep quality

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International Journal of Ophthalmology(English edition) 2024年第2期17卷 353-358页

作者： Pui Juan Woi Joyce Yi Ling Lu Mohd Izzuddin Hairol Wan Nur Amirah Ibrahim Optometry and Vision Science Programme Center for Community Health Studies(ReaCH)Faculty of Health SciencesUniversiti Kebangsaan MalaysiaKuala Lumpur 50300Malaysia Centre of Optometry Studies Faculty of Health SciencesUniversiti Teknologi MARASelangor BranchPuncak Alam CampusSelangor 42300Malaysia

AIM:To compare the vergence mechanisms between good and poor sleepers in university ***:A total of 64 university students were recruited in this *** validated Malay version of Pittsburgh Sleep Quality Index questionnaire(PSQI-M)was used to measure the participants’sleep quality over the past *** were categorized as good sleepers(n=32)and poor sleepers(n=32)based on the PSQI-M *** and fusional vergences were measured at distance and ***-Whitney U test was used to compare heterophoria,negative fusional vergence(NFV),and positive fusional vergence(PFV)at distance and near between good and poor *** correlation analysis was used to study the relationship between PSQI-M score and PFV at ***:Both distance and near heterophorias were not significantly different between good and poor sleepers(P>0.05).There was a difference in distance PFV(P<0.05)between good and poor sleepers,but not in distance NFV,near NFV,and near PFV(P>0.05).Distance PFV was negatively correlated with PSQI-M score(rs=-0.33,P<0.05).CONCLUSION:University students with poor sleep quality demonstrates a reduced ability to maintain fusion with increasing convergence demand at *** quality assessment during binocular vision examination in university students is recommended.

关键词： binocular vision vergence sleep quality university students

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Development of Knowledge,Attitude and Practice Questionnaire for age-related macular degeneration patients

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International Journal of Ophthalmology(English edition) 2023年第4期16卷 589-600页

作者： Mohd Harimi Abd Rahman Prashanti Amirtharatnam Sharanjeet Sharanjeet-Kaur Sumithira Narayanasamy Hanif Farhan Mohd Rasdi Mae-Lynn Catherine Bastion Optometry and Vision Science Programme Center for Rehabilitation and Special Needs Studies(iCaRehab)Faculty of Health SciencesUniversiti Kebangsaan MalaysiaKuala Lumpur 53000Malaysia Optometry and Vision Science Programme Center for Community Health Studies(Reach)Faculty of Health SciencesUniversity Kebangsaan MalaysiaKuala Lumpur 53000Malaysia Occupational Therapy Programme Center for Rehabilitation and Special Needs Studies(iCaRehab)Faculty of Health SciencesUniversiti Kebangsaan MalaysiaKuala Lumpur 53000Malaysia Ophthalmology Department Faculty of MedicineUniversiti Kebangsaan MalaysiaKuala Lumpur 56000Malaysia

AIM:To develop and validate a questionnaire to evaluate knowledge,attitude and practice of patients diagnosed with age-related macular degeneration(AMD)who have undergone intravitreal injection ***:This study was conducted among patients diagnosed with AMD in Kuala *** generation of the instrument included four phases which included item and domains development,content,face validity and exploratory factor *** validity and modified Kappa was used for validation of knowledge *** factor analysis was used for validation of both attitude and practice *** validity was conducted in 12 patients,content validity was ascertained in 120 patients and test-retest reliability was determined in 39 patients with ***:Content validity index(CVI)and modified kappa showed excellent values for most items in the knowledge domain with CVI for item(I-CVI)values between 0.78-1.0 and Kappa values of>*** Kaiser-MeyerOlkin(KMO)sampling adequacy showed acceptable scores of 0.70 and 0.75 for both attitude and practice domains respectively and Bartlett’s Test of sphericity were significant(χ^(2)=0.00,P<0.001).Factor analysis resulted in five factors with thirty items for attitude domain and four factors with twenty items for practice *** Cronbach’s alpha showed acceptable values for all items in knowledge,attitude and practice domain with values>0.70 and good test-retest *** final version of the questionnaire consisted of 93 items from four sections consisting of demographic details,knowledge,attitude and ***:The findings of this validation and reliability study show that the developed questionnaire has a satisfactory psychometric property for measuring KAP of patients diagnosed with AMD undergoing intravitreal injection treatment.

关键词： knowledge attitudes practice age-related macular degeneration instrument development

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Macular retinal sensitivity using MP-1 in healthy Malaysian subjects of different ages

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Journal of optometry 2015年第4期8卷 266-272页

作者： Ismail, Siti Aishah Kaur, Sharanjeet Mutalib, Haliza Abdul Ngah, Nor Fariza Optometry and Vision Science Programme School of Healthcare Sciences Universiti Kebangsaan Malaysia Kuala Lumpur 50300 Malaysia Department of Ophthalmology Hospital Selayang Lebuhraya Selayang Kepong Batu Caves 68100 Malaysia

Purpose To determine the influence of age and gender on macular sensitivity to light in healthy subjects of 4 age groups using the MP-1 microperimeter. Methods A prospective study was carried out on 50 healthy subjects (age range: 18-60 years) divided into 4 age groups;18-30 years, 31-40 years, 41-50 years and 51-60 years. Full-threshold microperimetry of the central 10° of retina was performed utilizing 32 points with the MP-1. Macula area was divided into four quadrants, which were superior nasal (SN), inferior nasal (IN), inferior temporal (IT) and superior temporal (ST). Results Total mean sensitivity at 10° for age groups 18-30 years, 31-40 years, 41-50 years and 51-60 years were 19.46 ± 0.30, 19.40 ± 0.39, 19.47 ± 0.35 and 18.73 ± 0.75 (dB), respectively. There was a significant difference in total mean retinal sensitivity at 10° and at the four quadrants with age but not for gender. The retinal sensitivity was highest in the IT quadrant and lowest in the SN quadrant for all age groups. The linear regression analysis revealed that there was a 0.019 dB, 0.016 dB, 0.022 dB, 0.029 dB and 0.029 dB per year age-related decline in mean macular sensitivity within the central 10° diameter in the SN, IN, IT and ST quadrants respectively. Conclusion Among normal healthy subjects, there was a linear decline in retinal light sensitivity with increasing age with the highest reduction in the superior nasal quadrant and lowest in the inferior temporal quadrant. © 2015 Spanish General Council of optometry. Published by Elsevier España, S.L.U. All rights reserved.

关键词： Age Microperimetry MP-1 Retinal sensitivity

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Novel tools for driving fatigue prediction: (1) Dry eeg sensor and (2) eye tracker

Novel tools for driving fatigue prediction: (1) Dry eeg sens...

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7th International Conference on Foundations of Augmented Cognition, AC 2013, Held as Part of 15th International Conference on Human-Computer Interaction, HCI International 2013

作者： Tey, Frederick Lin, Sheng Tong Tan, Ying Ying Li, Xiao Ping Phillipou, Andrea Abel, Larry Combat Protection and Performance Programme DSO National Laboratories 27 Medical Drive #09-00 Singapore 117510 Singapore Neuroengineering Lab Department of Mechanical Engineering National University of Singapore Singapore Department of Optometry and Vision Sciences University of Melbourne Australia

ISBN: (纸本)9783642394539

National Sleep Foundation's Sleep in America (2005) reported 60% of adult drivers driving a vehicle while feeling drowsy in the past year, and more than 37% have actually fallen asleep at the wheel [1]. This paper presented the findings of two novel fatigue prediction tools. The first study presents a 4-channel dry EEG under simulated driving being able to predict when the driver will develop microsleep in the next 10 minutes using only 3 minutes data of collected, with an accuracy of more than 80%. The second study uses an eye tracker to assess the percentage of time that the eyelids were closed (PERCLOS) as a potential marker for fatigue. Results showed that the average magnitude of oscillation (amount of pupil fluctuation), known as Coefficient Magnitude (CM), is generated from real-time wavelet analysis, has the potential to predict fatigue 8-12 minutes ahead with 84% accuracy ahead of compromised driving behavior. © 2013 Springer-Verlag Berlin Heidelberg.

关键词： Forecasting

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Association between vision and cognitive function among community-dwelling older adults in Selangor,Malaysia

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International Journal of Ophthalmology(English edition) 2023年第1期16卷 115-120页

作者： Zainora Mohammed Qiu-Ting Kee Norliza Mohamad Fadzil Mohd Harimi Abd Rahman Normah Che Din Vanitha Mariappan Suzana Shahar Programme of Optometry and Vision Science Faculty of Health SciencesUniversiti Kebangsaan MalaysiaJalan Raja Muda Abdul Aziz 50300Kuala LumpurMalaysia Centre for Rehabilitation and Special Needs Study Faculty of Health SciencesUniversiti Kebangsaan MalaysiaJalan Raja Muda Abdul Aziz 50300Kuala LumpurMalaysia Center of Toxicology and Risk Health Faculty of Health SciencesUniversiti Kebangsaan MalaysiaJalan Raja Muda Abdul Aziz 50300Kuala LumpurMalaysia Programme of Dietetic Faculty of Health SciencesUniversiti Kebangsaan MalaysiaJalan Raja Muda Abdul Aziz 50300Kuala LumpurMalaysia.

AIM:To determine the association between distance and near visual acuity(VA)and cognitive function among older adults in Selangor,***:A total of 230 older adults(age≥60y)participated in this *** distance and near VA were measured using the Early Treatment Diabetic Retinopathy Study Chart and Lighthouse Near Visual Acuity Chart,*** cognitive function was assessed using the Mini-Mental State Examination(M-MSE)and the Malay language version of the Montreal Cognitive Assessment(M-MoCA).Digit Symbol(DS)subtest was used to measure information ***:No significant association was observed between vision and M-MSE and M-MoCA ***,poor distance and near VA were found to be significantly associated with low DS scores[distance VA:β=-0.01,R2=0.1,P=0.02;odds ratio(OR)=2.84,95%confidence interval(CI),1.10-7.33,P=0.03;near VA:β=-0.05,R2=0.08,P=0.00;OR=3.32,95%CI,1.28-8.59,P=0.01].CONCLUSION:Poor vision is associated with a decline in information processing in older adults and substantiates the importance of preserving good vision in maintaining cognitive function.

关键词： ageing cognition global cognitive function information processing vision

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Students’ Perception on Lecture Delivery Effectiveness among the Faculty of Health sciences Lecturers

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Procedia - Social and Behavioral sciences 2012年 60卷 67-72页

作者： Ahmad Rohi Ghazali Ismarulyusda Ishak Nur Zakiah Mohd Saat Rifina Arlin Zainal Arifin Asmah Hamid Yanti Rosli Zainora Mohammed Mohd Sham Othman Firdaus Kamarulzaman Biomedical Science Programme School of Diagnostic & Applied Health Sciences Faculty of Health Sciences Universiti Kebangsaan Malaysia Optometry & Vision Science Programme School of Healthcare Sciences Faculty of Health Sciences Universiti Kebangsaan Malaysia Environmental Health & Industrial Safety Programme School of Diagnostic & Applied Health Sciences Faculty of Health Sciences Universiti Kebangsaan Malaysia

Lecture delivery is one of the major criteria in assessing overall lecturer's performance apart from research and publications. The main objective of this study was to evaluate the lecture delivery effectiveness among Faculty of Health sciences (FSK), Universiti Kebangsaan Malaysia (UKM) lecturers from the perception of students. Lecture delivery effectiveness was correlated significantly with characteristics of lecturers, attitudes of students, facilities and students’ satisfaction, but not associated with students’ grade. Different opinions were observed between undergraduates and postgraduates on lecture delivery effectiveness. More attention should be given to improve the quality of teaching in FSK.

关键词： Effectiveness Lecture delivery Learning methods Students’ perception

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Automated Corneal Segmentation of Anterior Segment Photographed Images using Centroid-Based Active Contour Model 16

Automated Corneal Segmentation of Anterior Segment Photograp...

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16th International Learning and Technology Conference, L and T 2019

作者： Daud, Marizuana M. Diyana, W. Mimi Zaki, W. Hussain, Aini Mutalib, Haliza Md Saad, M. Hanif Razak, Aishah Centre of Integrated Systems Engineering and Advanced Technologies Faculty of Engineering and Built Environment University Kebangsaan Malaysia Bangi43600 Malaysia Optometry and Vision Sciences Programme School of Healthcare Sciences Faculty of Health Sciences University Kebangsaan Malaysia Kuala Lumpur50300 Malaysia Visual and Digital Production Effat University Jeddah21478 Saudi Arabia

In this paper, we propose an automatic Active Contour Model (ACM) using corneal centroid information for corneal segmentation. The algorithm was validated on 259 of Anterior Segment Photographed Images (ASPIs) that were captured using a smartphone. The proposed system comprises of four components;a) data collection, b) pre-processing, c) corneal segmentation using proposed automated centroid-based ACM, and (d) feature extraction. There were five corneal shape parameters employed, namely Horizontal Visible Iris Diameter (HVID), Vertical Visible Iris Diameter (VVID), eccentricity, asphericity and solidity. Each of these parameters has its own significant features in measuring the corneal shape quantitatively, which could potentially assist the ophthalmologists during a screening process. Using all ASPIs, the findings show that this method is competent in segmenting 231 corneal regions while Circular Hough Transform method only manage to segment 165 regions successfully. These segmentation results demonstrate a bright potential towards the development of intelligent classification system for ocular diseases. © 2019 The Authors. Published by Elsevier B.V.

关键词： Image segmentation

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Automated Corneal Segmentation of Anterior Segment Photographed Images using Centroid-Based Active Contour Model

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Procedia Computer Science 2019年 163卷 330-337页

作者： Marizuana M. Daud W. Mimi Diyana W. Zaki Aini Hussain Haliza Mutalib M. Hanif Md Saad Aishah Razak Centre of Integrated Systems Engineering and Advanced Technologies Faculty of Engineering and Built Environment University Kebangsaan Malaysia 43600 Bangi Malaysia Optometry and Vision Sciences Programme School of Healthcare Sciences Faculty of Health Sciences University Kebangsaan Malaysia 50300 Kuala Lumpur Malaysia Visual and Digital Production Effat University Jeddah 21478 Saudi Arabia

In this paper, we propose an automatic Active Contour Model (ACM) using corneal centroid information for corneal segmentation. The algorithm was validated on 259 of Anterior Segment Photographed Images (ASPIs) that were captured using a smartphone. The proposed system comprises of four components; a) data collection, b) pre-processing, c) corneal segmentation using proposed automated centroid-based ACM, and (d) feature extraction. There were five corneal shape parameters employed, namely Horizontal Visible Iris Diameter (HVID), Vertical Visible Iris Diameter (VVID), eccentricity, asphericity and solidity. Each of these parameters has its own significant features in measuring the corneal shape quantitatively, which could potentially assist the ophthalmologists during a screening process. Using all ASPIs, the findings show that this method is competent in segmenting 231 corneal regions while Circular Hough Transform method only manage to segment 165 regions successfully. These segmentation results demonstrate a bright potential towards the development of intelligent classification system for ocular diseases.

关键词： Corneal segmentation automated active contour model corneal features anterior segment photographed images

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