This section provides general information about common eye problems. Our Optometrists are members of the Optometry Association of Australia, and the following information is © of the Optometry Association of Australia.
This section is NOT provided for “self diagnosis” and it is recommended that if you are concerned about your eyes or a family member’s eyes you should contact us for an eye examination. In most cases, we are able to bulk bill eye examinations for you.
For perfect clear vision, the image needs to be focused onto the retina, just as a camera has to be focused properly in order to take a clear picture.
The eye’s lens and cornea focus light into an image on the retina, just as a camera lens focuses light onto a film. In a hyperopic (long-sighted) eye the light is focused behind the retina and so the image is blurred.
This is often called short-sightedness. Short-sighted people do not see distant objects clearly. The eye’s lens and cornea normally focus light on the retina. In a myopic eye, the light is focused in front of the retina, thus the image is blurred.
Is a focusing error which causes asymmetric blur. Some directions of an image are more out of focus than others. This can be contrasted with short-sightedness (myopia or, long-sightedness, hyperopia) where all directions are uniformly blurred.
At some stage, everyone starts to have trouble reading fine print. Whether the page is close to the eyes or held at arm’s length, the print is blurred and attempts to read it are frustrating.
This loss of near vision happens to all of us and is quite normal. It begins for most of us in the early forties and this is called presbyopia. Fortunately there is a solution to this problem: wearing corrective spectacle lenses brings the sharpness again to fine print.
Is a common condition which makes vision difficult at a normal reading distance. It is not a disease. Close tasks such as reading and sewing become difficult, particularly under poor lighting conditions.
While many older people maintain good eyesight well into their 80s and beyond, others may have their vision affected by some type of visual impairment. As part of the normal ageing process some changes often occur that can blur your vision.
Difficulties with eye muscle coordination occur when the eyes do not align or focus together as a team. This improper control of the eye muscles can result in crossed-eyes, poor focussing ability, or simply discomfort and headache from the extra effort required.
Common remedies are vision training, prisms, therapeutic spectacles and progressive/multifocal lenses.
Amblyopia (sometimes called “lazy eye”), results from abnormal development of vision in early childhood. In amblyopia one eye develops normally while the other eye (the amblyopic eye) fails to develop normal vision.
To see clearly and without confusion at close distances, both eyes must be aimed precisely at the object the person is trying to see.
Unfortunately not everyone develops this ability in childhood. Inaccuracy of the alignment of the eyes can result in visual fatigue, blurred or doubled vision, poor judgment of depth, eye ache, headache and mental fatigue.
Vision is a learnt skill that embraces the ability to identify, interpret and understand what is seen. It requires not only correct focusing but also the efficient mechanical functioning of the eyes and brain and a high degree of coordinated activity of the two eyes.
Visual Stress is a sensitivity to patterns, particularly stripes. In some people the pattern of written text can cause discomfort and eyestrain, even when they have normal vision.
Colour vision defects are almost always inherited, although some forms can be an acquired condition as a result of some diseases or injuries.
More than 99% of UV radiation is absorbed by the anterior structures of the eye, although some of it does reach the light-sensitive retina. The UV radiation present in sunlight is not useful for vision.
One of the most significant changes to the modern office in recent years has been the introduction of computers into the workplace. As a result we spend a lot more time using a VDU (visual display unit) screen or computer monitor.