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Ocuco at Shanghai International Optics Fair (SIOF) 2012
y Maurizio PittauFebruary 14, 2012
For the first time, Ocuco will be exhibiting at this year’s Shanghai International Optics Fair (SIOF),
Read More: 3d glasses, low vision aids, spectacle accessories, spectacles frames, ophthalmic lenses,ophthalmic products, international optics, spectacle frames, optical workshop, shanghai international
For the first time, Ocuco will be exhibiting at this year’s Shanghai International Optics Fair (SIOF), taking place from the 22nd to the 24th of February, 2012. Come and visit us at stand no. 2766. Click here http://www.ocuco.com.au/SIOF-2012.html to make an appointment and receive a demonstration at the stand.
SIOF is one of the largest optical devices exhibitions in Asia and showcases most of the international brands and products. This is the 12th show since its inception. The show offers a wide range of exhibits including spectacle frames, sunglasses, lenses, contact lens, 3D glasses, digital lenses, visual test equipment, machinery and materials for making spectacles frames and lenses, spectacle accessories, parts and components, raw materials for frames and lenses, moulds, eyecare products and solutions for lenses and contact lens and cases. It also offers instruments for optometry and ophthalmology, ophthalmic products, tools and equipment for optical workshop, ophthalmic lenses, low-vision aids and test equipment, Trade magazines and exhibitions, association of the optical industry.
News Source: http://www.free-press-release.com/news-ocuco-at-shanghai-international-optics-fair-siof-2012-1329241507.html
The Art and Science of Writing a Prescription by an Ophthalmologist
The Art and Science of Writing a Prescription by an Ophthalmologist
The clinical examination for a spectacle power lens is called refraction. All eye specialists are perfectionists besides being surgeons. But the science of refraction is also given as a clinical course to non-medical persons. It is called optometry and includes refraction and the making of spectacle glasses and their fitting into frames. The optometry course is of two or three years all over the world. Nobody, except an eye specialist or an optometrist, is authorised to test eyes though in the hard trade world of today every salesman claims to be an oculometrist. The oculometrist, however, always seeks the help of an ophthalmic surgeon when a problem involves more than eve testing. I would like to emphasise that there is no alternative treatment by way of drugs to substitute glasses. In all cases, glasses must be accepted as a tonic for the eyes.
Types of Glasses worn and the Purpose they Serve
lasses with Minus (-) Number (Short-sight)
A minus power is used to increase vision for long distance. A person with a minus power is called short-sighted.
Short-sightedness implies a good vision for close work only. A short-sighted person may see quite well without glasses when it comes to close work like reading and writing but is blind for long distance. If his number is high, he holds books very close to read clearly. The power of these glasses may be as much as -7, -10, -15, or even more in exceptional cases. The wearer of minus glasses must see that he uses his glasses constantly to keep his vision normal and eyes healthy.
The minus number has a tendency to increase over time, so much so that from -1 it may go up to -6 at an alarming speed, causing the wearer to worry and wonder why the number is increasing even though he or she is wearing glasses. The increase in number is a natural phenomenon in short-sighted eyes. It increases as a child’s height- increases with the growth of the bones. There is nothing one can do to stop it. In 60-70 per cent cases such a condition is hereditary. When the glasses become unsatisfactory, a check¬up must be undertaken and changes made from time to time. Once the sight improves to 6/6 or 6/9 with glasses, however high the number otherwise is, the eye is healthy and should not cause any alarm.
In the case of higher numbers (-7 to -12) the person must take precaution and avoid strenuous exercises which strain the eye, and intensive close work, particularly at night. This will not prevent the power from increasing but will prevent other complications (read Chapter No. 11 on myopia). In people with numbers -12 to -20 the thickness and weight of glasses do not allow vision to reach the normal 6/6. Some inherent weakness of sight remains. These persons need the utmost care and help.
Glasses with (+) Plus Number (Long-sight)
A plus power with low numbers is required for close work. Where the higher powers of +2, +3, +4, etc., are required, glasses need to be worn constantly. There are special plus (+) glasses for the middle aged group of 40-42 years (see Chapter on Bifocal).
Compound Glasses
Compound glasses” is a commonly heard name among spectacle wearers. A compound glass is a spectacle glass which has simple spherical power glass combined with an astigmatic power with an axis (cylindrical). The two are cemented together by the manufacturer.
A compound glass is usually meant to be worn constantly, day and night, to avoid eye strain and headaches. Please follow the figures (on next page) for various kinds of spectacles:
Making and Fitting Spectacle Lenses by an Optometrist (Optician)
The art and science of changing a written prescription to spectacle lenses, fitted into a frame, by a scientifically correct process are the job of an optometrist — called an optician by the layman. (Fig. 9.1 for all types of glasses).
No effort should be spared in the making and correct fitting of lenses in appropriate frames. The comfort and relaxation of the eye depend on this precise fitting. There is considerable and highly specialised optical-physics involved in making spectacles. Their correct fitting gives comfort and relaxation to the eyes and their correct power gives improved vision. The choice of an “optician” should be based on the reputation, maturing experience and courteous service rendered to a patient along with a balance of humanitarian element and business acumen.
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