Optical And Neural Limits Of Visual Performance In Myopia
Funder
National Health and Medical Research Council
Funding Amount
$191,902.00
Summary
Short-sightedness (myopia) is one of our most common eye problems, affecting approximately 20% of people. It is usually due to the eye becoming too long for its power. While we can correct short-sight with contact lenses, spectacles and more recently refractive surgery, recent evidence shows that the vision of corrected myopes is poorer than that of people who have good distance vision without the need for an optical correction. This reduction is present even when the optical minification of spe ....Short-sightedness (myopia) is one of our most common eye problems, affecting approximately 20% of people. It is usually due to the eye becoming too long for its power. While we can correct short-sight with contact lenses, spectacles and more recently refractive surgery, recent evidence shows that the vision of corrected myopes is poorer than that of people who have good distance vision without the need for an optical correction. This reduction is present even when the optical minification of spectacle lenses is taken into account (the lenses used to correct short-sightedness make objects look smaller). It is possible that the anatomical changes to the eye that occur in short-sightedness are the cause of the reduced vision. Even if the optics can be fully corrected with refractive surgery, as is now being proposed, this may not result in excellent vision. The anatomical changes may occur in different parts of the eye and depending on where they occur the nature of the visual reduction will vary. The location of the retinal changes may also be important in terms of eventual pharmacological treatments for short-sightedness. In addition, the significance of the visual reduction, in terms of its effect on the functioning of short-sighted people, e.g. ability to perform under less than optimal visual conditions such as in the presence of glare or reduced light levels, is not known. We plan to investigate this by identifying the optical and neural contributions to visual performance in short-sighted people.Read moreRead less
Sharpening The Epidemiological Sword Against Ocular Trauma To Help Improve Management And Predict The Visual Outcomes, Contributing To The Development Of Prevention
Funder
National Health and Medical Research Council
Funding Amount
$59,168.00
Summary
Eye injury is the leading cause of monocular blindness internationally. Vision loss has devastating consequences, both financial and social. My research aims to develop a comprehensive international register for eye injury. Working with key international partners we will conduct a large-scale retrospective review to validate our data collection tool. Our aim is to revise outdated methods of scoring eye injury to better predict outcomes and improve management and treatment of eye injury.
Falls Risk Associated With Cataract And After First And Second Eye Cataract Surgery
Funder
National Health and Medical Research Council
Funding Amount
$801,559.00
Summary
Cataract surgery is the most commonly performed elective surgery in Australia, with approximately 200,000 surgeries each year. However, vision impairment due to cataract is relatively common and around 1.7 million Australians are affected at any one time. Cataract-related vision impairment has many negative consequences including increased risk of falls. The findings of this research will inform strategies for reducing falls and engageing with the ophthalmic health care sector on the critical is ....Cataract surgery is the most commonly performed elective surgery in Australia, with approximately 200,000 surgeries each year. However, vision impairment due to cataract is relatively common and around 1.7 million Australians are affected at any one time. Cataract-related vision impairment has many negative consequences including increased risk of falls. The findings of this research will inform strategies for reducing falls and engageing with the ophthalmic health care sector on the critical issue of falls injury for older people.Read moreRead less
Seeing Clearly: Examining The Consequences Of Glaucoma For The Human Brain
Funder
National Health and Medical Research Council
Funding Amount
$439,694.00
Summary
Glaucoma is a major cause of blindness. Many people are unaware of the resulting blind region (scotoma) and fail to get an eye test, allowing the disease to progress. This project aims to see how the brain ‘fills in’ the scotoma, and the effect of different scotoma types, using vision tests, brain imaging, and behavioural methods. The results will tell us whether the region around a scotoma helps or hinders the person's remaining vision, which is critical for activities such as driving.
Age Related Changes In The Optics Of Adult Human Eyes
Funder
National Health and Medical Research Council
Funding Amount
$199,437.00
Summary
Vision is limited by both optical and retinal-neural factors. Our understanding of the optical structure of the human eye is limited, partcularly for the refractive index gradient of the lens, let alone how these change with age. This understanding is needed if we are to accurately predict or assess the long-term effects of refractive surgical procedures or ophthalmic prostheses on vision. In this project, we aim to substantially improve our understanding of the optical properties of the eye by ....Vision is limited by both optical and retinal-neural factors. Our understanding of the optical structure of the human eye is limited, partcularly for the refractive index gradient of the lens, let alone how these change with age. This understanding is needed if we are to accurately predict or assess the long-term effects of refractive surgical procedures or ophthalmic prostheses on vision. In this project, we aim to substantially improve our understanding of the optical properties of the eye by 1) developing methods for measuring these quantities and then applying the methods to investigate how these properties vary with age and focussing, and 2) determine the optical contribution to reduction in visual performance with increasing age. Our research will be used to determine norms for growth and aging patterns in the normal human eye, particularly the lens. It will yield significant outcomes through 1. determination of the long-term success of custom refractive surgery aimed at improving vision by eliminating the ocular aberrations, and 2. indicating the potential improvement in ocular performance provided by artificial intraocular lenses or any other type of correction.Read moreRead less
The GABAergic System In Eye Growth Control And Myopia
Funder
National Health and Medical Research Council
Funding Amount
$318,142.00
Summary
Shortsightedness (myopia) is the most common visual disorder. High myopia is associated with an increased risk of eye diseases. Current treatments do not stop myopia developing or decrease the associated risk of eye disease. The continued worsening of myopia is very concerning. A safe effective treatment that can either prevent myopia or stop its progression to extreme levels is needed. We have data showing that GABA ergic drugs modify myopia. This proposal will determine the mechanisms.
Metrics Of Optical Quality Predictive Of Visual Performance In Eye Disease
Funder
National Health and Medical Research Council
Funding Amount
$121,655.00
Summary
Highly precise measurement of the optical quality of the human eye (how well an image is formed by light passing through the eye) is now possible. While eye's optics can be measured, it is less clear how to report optical quality in a way that is related to how well the eye sees; optics and vision are complex. This project will attempt to find ways to describe the optical quality of the human eye that predicts how well the eye sees - both for the normal eye and eyes with disease.