+ What are your opening hours?
We are open Monday to Friday from 8.30 until 5pm
Saturdays we open from 9am until 12
+ What are Brian Roos optician product guarantees?
• A year guarantee is given on manufacturing faults on our frames.
• Polycarbonate, trivex and airwear material lenses are guaranteed on breakage of the lenses, for a year. Glass and plastic lenses are not guaranteed on any breakage
• No guarantee on tearing of contact lenses, unless the batch is faulty
+ What is a progressive or multifocal lens?
A progressive lens is also known as a multifocal lens. Progressives are bifocals or trifocals without the lines, offering a continuous, gradual change in prescription strength from the lower (reading correction), to the intermediate (mid distance correction) to the upper (distance correction) portion of the lens. As a first time wearer of progressive lenses, you need to consider a two to three week adaptation period. During this time you learn to locate the areas of the lens needed for different viewing distances.
+ Why do I need reading glasses?
As we get older, regardless of whether or not we have always had normal vision or have suffered from myopia, hyperopia or astigmatism, a natural age-related process steps in that affects everyone. When you go past the age of 40-50, the lens inside your eye loses its elasticity and cannot accommodate any more. Accommodate means it becomes difficult to focus on objects that are close at hand. Holding reading material at arms length, we temporarily compensate for this problem, however for this condition, called presbyopia, you normally need reading glasses.
+ What is a floater ?
Floaters are a condition characterized by cloudy particles within the eye that seem to float about in the field of vision. As we age, the fluid in the eye becomes more compact, forming these cloudy particles. Due to gravity, these particles lay at the bottom of the eye and only on movement of the eye we seem to notice them. A good exercise is to stand facing a white wall, keeping the eyes very still. Upon movement of you eye, notice the shape and amount of floaters moving. Almost everyone has some floaters; they are quite common and are usually harmless.
+ What is a Pteryrigium
A pterygium is the pinkish yellow growth on the conjunctiva, which can be seen with the naked eye. The conjunctiva is transparent and covers the white sclera of the eyeball. The cornea is the round central transparent area that covers the coloured iris and black pupil. A pterygium can grow towards and onto the cornea, inducing astigmatism and loss of vision. When this happens, it needs to be surgically removed.
Pterygiums are fairly common in areas where people live mostly outdoors, and where they are more exposed to ultra-violet rays, wind and dust. When a pterygium is irritated by above factors it can become inflamed, red and uncomfortable. Therefore it is always wise to wear a good pair of sunglasses and use a moisture drop, to relieve discomfort.
+ Can medication trigger visual problems?
Drugs, and mostly drug combinations, where it improves one condition, can cause side effects in another part of the body. Taking these medications may have a drastic effect on your vision, due to the eye's blood vessels that are very sensitive and physiologically different from the rest of the body. These visual changes may be symptomatic of a reaction to medication: it includes dry or teary eyes, blurred, yellow or double vision, sensitivity to light, puffy eyelids, increased pupil sizes, poor night vision, and change in your normal eye color. Consult your GP before reducing any intake of medication.
+ How do corrective lenses work?
To correct visual problems, lenses are manufactured to adjust light waves, as they enter the eye, to focus optimally on the retina.
In myopia, light rays are focused in front of the retina. A lens that is thicker on the edge than in the center is called a minus lens. This lens is used to place the light rays that is in front of the retina, back on the retina, correcting myopia. The more myopic you are, the thicker the edge of your lens will be. With this in mind, it is important when choosing your frame. A rimmed smaller shaped or plastic frame will hide your lens thickness, while the HRI lenses will decrease minification as well as lens thickness.
In hyperopia, the light rays entering the eye are focused behind the retina. A plus lens, which is thicker in the middle, than the edge, redirects the light onto the retina, correcting hyperopia or farsightedness. The higher your prescription of hyperopia, the thicker the center of your lens will be. It is important choosing HRI or knife-edge lenses, which will make the lens thinner, decrease weight, decrease magnification which will improve cosmetics. A rimmed or semi-rimmed plastic or metal frame is also advised.
To correct astigmatism, we use toric lenses. These lenses are extremely complex in that they have to bend light rays at different angles. Remember when choosing a frame, especially a semi-rimmed or rimless frame, that the angle at which you are astigmatic will be the thickest part of the lens.
+ I want coloured contact lenses... what do I do ?
If you want to wear coloured contact lenses for fun, you still need to see an optometrist for a contact lens consultation, even if you don't have visual problems. The reason for this is to determine if you are suitable for wearing contact lenses, giving instructions how to care for your lenses and to rule out any eye health problems. There are a variety of coloured lenses on the market, mostly monthly disposable. Dark and light coloured eyes can benefit from these contact lenses, whether you want a drastic change or just enhance your natural eye color. Remember that it is just as important to care for your coloured contact lenses, than any normal contact lens, even if you don't wear them everyday!
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