An eye with Astigmatism usually produces 2 focusing point at different distances. This can be a result of a non-spherical optical medium such as an irregular cornea surface. Correction of this refractive error is most commonly done with spectacles or contact lenses. Uncorrected astig will produce fuzzy images, due the eye inability to focus on fine details.
Hyperopia is a condition of the eye where one experience difficulty in focusing objects at near. The nearer an object is to the eye of a hyperope, the blurrer the object will become. Causes of hyperopia may be too short an eyeball or lens of the eye are not round enough.
A very high degree of long sightedness will have difficulty in focusing objects at all distances. Most common correction form will be spectacles or contact lenses. Hyperopia is not to be mistaken with presbyopia although both condition will produce blur imsages of objects at near.
To test the inside out of Contact Lens, place the lens on the tip of your finger.
Left : Correct Side ("Bowl" Shape)
Right : Wrong Side (Sides flare out)
Notice how flatter and different is the edge of the lens compared to the correct side.
Another method of testing would be gently pinching the edge of the lens together.
Left: Correct Side (Edge of lens bends inwards)
Right: Wrong Side (Edge resist bending inwards)
Also, certain brand of contact lens has laser markings on their lens to help identify the correct side.
Generally, contact lens worn inside out should not cause any real damage to the eye. Even so, it is still important to check the lens before you wear them as inside out lens will reduce the effectiveness of your lens, causing discomforts and affecting the overall performance of your contact lens.
Click on the picture and print out the voucher. Enjoy a one time $20 off your purchase of polarized lenses with this voucher. Terms and conditions apply. Only applicable at Emperor Optics Sembawang Shopping Centre. See you soon!
We've all heard about it but what exactly is glare? 
When light hits a surface, it becomes scattered in all directions, creating difficulty in viewing objects, producing strain and discomfort in the eyes as we try to overcome the increase in brightness. When the glare is too disturbing, you will tend to look away, squint your eyes and is dangerous when they affect your ability to see things well.
Normal sunglasses cannot block off glare efficiently. They merely reduce the amount of light entering thus lowering the illumination, but Polarized lenses is able to filter out the unwanted glares and yet allow the useful visible light to pass through the lenses and reach our eyes. 
One classic example:
Imagine you are fishing on a bright sunny day, facing the extremely reflective water.
On your right is how one perceive through a pair of normal UV tinted sunglasses.
Next would be how one perceive through a pair of polarized lenses.
Now are you able to tell the difference? So why choose a pair of normal sunglasses when you can have that extra edge with a pair of polarized lenses. Whether you are a golfer, a fisherman or a driver on the road, polarized lenses will be one of the best sun lenses you can have that provides you with 100 percent UV protection, excellent glare reduction, paired with the availability to be made into prescription and/or tinted to enhance and fulfil your sport's specific needs.
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Side shields are available to provide a bigger coverage of protection. Side Shields will have to pass the high velocity impact test and will also bear the marking Z87.
Frames nowadays can be made from alot of materials and can be generally found as:
Monel (nickel based): It is the most commonly used material for budget frames. Can be a mixture of metals. It is considered to be one of the heaviest materials used for metal frames. Easy for adjustment and ideal for economical purchases. Might cause some allergic reaction if plating on frame comes off.
Stainless Steel: This material is nickel free thus minimizing the chances of allergic reactions. They are strong in nature and is corrosion resistant. Most coloured stainless steel is able to hold their colours well. Good material that comes at a reasonable pricing.
Titanium: Getting more and more popular among consumers looking for quality products. 100% corrosion resistant, titanium frames are well known for their light weight and is hypo-allergnic (Does not cause any unwanted skin reaction). A well made titanium frame when taken care of, can serve you well.
Aluminium: Soft and weak on its own, it is usually mixed as an alloy with other material. Light weight in nature as well, these corrosion resistant material can be a good alternative to titanium frames.
Zyl (Cellulose Acetate): This is the most commonly used material for plastic frames. An easy on the pocket material that comes in a huge variety of colours. This type of plastic will lose its shape if put under heat and will with age, becomes a little more brittle.
Optyl: A very good lightweight plastic with a memory effect. Works great with colours and paired with flexibility for comfort wearing. Stronger material than cellulose acetate.
There is a lot more material used in production and we hope to share them with you on your visit.
Thank you once again. Have a wonderful day.
Coloured lenses other than being aesthetically nice, can be used to enhance our vision as well. Here are some brief introductions to the most commonly used colors.
Gray: The most popular colour for sunglasses. Great for general purpose usage. Reduction of glares while maintaining our ability for colour perception. to the eyes when used under bright conditions.
Amber/ Brown Color: Improves contrast with better depth perception. These warms colours are also able to block away blue light which is believed to be harmful.
Yellow: This is the colour most ideal for filtering out blue light while maintaining a high level of contrast. A favourite for night driving.
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There are a lot of lenses on the market right now that can provide 100 percent UV protection, coming in the form of prescription lenses as well. They come in a lot of forms and can be generally categorized into:
Blue-Blockers: As the name suggests, these lenses helps eye protection by blocking blue light.
Blue light, also known as high-energy wavelength of light, from many primate studies, has been widely believed to be one of the main factors for causing macular degeneration, a deterioration of the back of the eye which will affect our sense of sight greatly. They are present everywhere, from the clear blue sky, to the fluorescent lamp in your room to anything that looks blue. Blue light falls within the range after ultraviolet lights, therefore are not protected from with the use of a normal UV sunglasses.
The color known to block blue light is yellow thus blue-blockers lenses will have a certain yellow tint in them. They can come in the form of different shades of yellow to amber and to plum. The lenses in our human eye with age turns yellow gradually, providing a certain filter in the eye from blue light. However, this natural form of protection are less prominent in the clear eyes of young childrens and in those who have it removed after a cataract extraction.
Thus the desirable benefits of Blue-blockers should be widely recommended for people of all ages who wants to go beyond the protection of a normal UV sunglasses.
Gradient Lenses: Gradient Lenses are also known as 2 tone lenses. They can be tinted into any colors and thus are one of the most popular choices among young people. Most common is the darkest at the top and lighter tone at the bottom.
Polarized Lenses: These lenses works great for people who wants to protect their eyes from disturbing glares, which sometimes can be dangerous especially if you are on the road. Overwhelming glare can cause alot of discomforts, causing involuntary squinting of the eyes and preventing you from enjoying the things you love to do.
In simple terms, Polarized lenses work through rearrangement of the light passing through so that only comfortable normal light passes through while the annoying glare produced is mostly blocked off. They come in a variety of colors which serves different purposes, most commonly found in gray color. Be it on a hot sunny day when driving on the road or fishing at your favourite spot, a pair of polarized lenses can bring you that additional comfort and protection through their efficiency at glare removal.
Photochromatic Lenses: Does not like the hassle of changing from your glasses to a sunglasses outdoor, or having trouble finding the right type of clip-on for your glasses? Then photochromic lenses might be the choice for you.
Material of photochromic lenses changes color, usually in the form of grey or brown color under stimulation by Ultraviolet rays, thus providing 100 percent UV protection, with the welcomed benefit of glare reduction. Transparency of the lenses will be regained gradually indoor, without the presence of Ultraviolet rays.
Confused by this many lenses? Not knowing which lenses to get? Please give us a visit so that our helpful optometrists and opticians can assist you in finding your right lenses.
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One of the easiest and most common way of protecting our eyes from harmful UV rays is to get a pair of sunglasses. Selecting the right type of sunglasses to suit your purpose and lifestyle is very important.
All the sunglasses available in our outlet provides 100 percent UV protection, blocking off UVA and UVB. Feel free to visit us any time so that our friendly optometrists and opticians can aid you in finding the right pair of sunglasses.
Here are some tips in choosing a suitable pair of sunglasses:
1. It must be able to provide 100 percent UV cut off in order to provide adequate protection to your eye.
2. Certain sports usage requires a specific type of sunglasses for optimum performance, for example, in sports such as fishing, polorized sunglasses will be a better choice for cutting away unwanted glares and reflections from the sea.
3. If possible, find a sunglasses that can provide better coverage for your eyes. Despite the need for a good lens, a frame with a good coverage will be even more effective at cutting UV from all directions.
4. Darkness of the lenses is not a representation on how much UV protection is provided. The darkest sunglasses does not neccessarily means that they are the most effective in UV protection.
Hope you find these information useful.
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Enjoying the scenery in the park with your love ones, sweating under the hot sun during an exciting game of golf with your friends or just a leisure swim at the beach by yourself, all these are just some of the many outdoor activities most of us love to do. While we are keeping the body and mind healthy, it is important for us to protect our sight from the harmful rays of the sun.
Unprotected prolong exposure to Ultraviolet rays (UV) from the Sun increases the risk of cataracts development, unwanted degenerations of the eye and in severe cases, can cause undesirable damage to the back of the your eye. Ultraviolet damage is accumulative, therefore it is imperative for you to start protecting your eyes early.
