Method of optical treatment

US7506983; US7506983 B2; US7506983B2; US7,506,983; US 7,506,983 B2; 7506983; Application No. 10/954,631Inventor name used in this publication: Chi Ho ToInventor name used in this publication: Siu Yin LamUSVersion of Recor

Little evidence for an epidemic of myopia in Australian primary school children over the last 30 years

BACKGROUND: Recently reported prevalences of myopia in primary school children vary greatly in different regions of the world. This study aimed to estimate the prevalence of refractive errors in an unselected urban population of young primary school children in eastern Sydney, Australia, between 1998 and 2004, for comparison with our previously published data gathered using the same protocols and other Australian studies over the last 30 years. METHODS: Right eye refractive data from non-cycloplegic retinoscopy was analysed for 1,936 children aged 4 to 12 years who underwent a full eye examination whilst on a vision science excursion to the Vision Education Centre Clinic at the University of New South Wales. Myopia was defined as spherical equivalents equal to or less than -0.50 D, and hyperopia as spherical equivalents greater than +0.50 D. RESULTS: The mean spherical equivalent decreased significantly (p < 0.0001) with age from +0.73 ± 0.1D (SE) at age 4 to +0.21 ± 0.11D at age 12 years. The proportion of children across all ages with myopia of -0.50D or more was 8.4%, ranging from 2.3% of 4 year olds to 14.7% of 12 year olds. Hyperopia greater than +0.50D was present in 38.4%. A 3-way ANOVA for cohort, age and gender of both the current and our previous data showed a significant main effect for age (p < 0.0001) but not for cohort (p = 0.134) or gender (p = 0.61). CONCLUSIONS: Comparison of our new data with our early 1990s data and that from studies of over 8,000 Australian non-clinical rural and urban children in the 1970's and 1980's provided no evidence for the rapidly increasing prevalence of myopia described elsewhere in the world. In fact, the prevalence of myopia in Australian children continues to be significantly lower than that reported in Asia and North America despite changing demographics. This raises the issue of whether these results are a reflection of Australia's stable educational system and lifestyle over the last 30 years

Optical Interventions for Myopia Control

Myopia is a common eye problem that is becoming more prevalent worldwide, particularly in East Asia. The cost of long-term care for myopia-related eye diseases significantly impacts the respective economies and places a great burden on the public health services. There is no doubt that myopia is a major East Asian public health concern and a significant concern globally, and effective control of myopia would help to alleviate the costs that are related to this problem. Currently, there are many types of optical interventions involving the use of spectacle lenses or contact lenses to slow down myopia progression in children. However, none of these myopia control methods have been proven to stop the development or progression of myopia completely and each method has their own limitations. Orthokeratology, soft bifocal contact lenses, prismatic bifocals, and myopic defocus incorporated spectacle lenses have all been shown to have clinically meaningful reductions in myopia progression ranging from 45% to 60%. Although pharmaceutical agents such as atropine have relatively better myopia control effects than optical methods, the associated side effects and uncertainty in the safety of long-term atropine use may hinder its widespread clinical application. Optical interventions are non-invasive and have become more popular compared to pharmaceutical treatments. This chapter provides an overview of the optical interventions for slowing myopia progression and their effectiveness in myopia control. Other myopia control methods will also be discussed briefly

Multiple segment spectacle lenses for myopia control. Part 2 : impact on myopia progression

202307 bckwNot applicableOthersInnoHK initiative; Hong Kong Special Administrative Region Government; Dept donation fundPublished12 month

Method of optical treatment

USRE43,851; USRE43851 E; USRE43851E; USRE43,851; US RE43,851 E; 43851; Appl. No. 10/954,631Author name used in this invention: Siu Yin LamUSVersion of Recor

Comparison of open-ended and close-ended questions to determine signs and symptoms of eye problems among children [Comparación entre las preguntas con respuesta abierta y cerrada para determinar los signos y síntomas de los problemas oculares en los niños]

202009 bcmaVersion of RecordPublishe

Multiple segment spectacle lenses for myopia control. Part 1 : optics

202307 bckwNot applicableOthersInnoHK initiative; Hong Kong Special Administrative Region Government; Dean's Reserve; Dept donation accountPublished12 month

The effect of a combined visual efficiency and perceptual-motor training programme on the handwriting performance of children with handwriting difficulties : a pilot study

Title on author’s file: The effect of a combined visual efficiency and perceptual perceptual-motor training programme on the handwriting performance of children with handwriting difficulties202205 bcfcAccepted ManuscriptOthersPolyU Central Research GrantPublishe

Lockdown in Hong Kong promotes myopia progression in schoolchildren : a case report

202203 bcfcAccepted ManuscriptOthersZVN1 (Dean’s Reserve, Faculty of Health and Social Science); 848K, The Hong Kong Polytechnic UniversityPublishe

Age-matched analysis of axial length growth in myopic children wearing defocus incorporated multiple segments spectacle lenses

202311 bcchVersion of RecordOthersInnoHK initiative, The Hong Kong Special Administrative Region Government; The Hong Kong Polytechnic UniversityEarly releaseC