The Basics of Lasik Eye Surgery

Laser eye surgery has been around since 1987, but new tools, computer lasers, and new techniques have brought Lasik surgery to not only to the budget conscious, but also to those with moderate vision problems. Although quick and usually painless, the procedure can have some risks as well as complications. Thoroughly knowledgeable patients will not only have an easier time with Lasik surgery, but there’s a good chance they’ll heal faster as well. Laser eye surgery can often bring 20/20 vision back to those who were impaired, hence its popularity.

Many Lasik eye doctors will spend time with you explaining before and after surgery procedures. Be honest with your doctor and make sure that all of your questions get answered to your satisfaction. There are many basic questions that need to be answered, and a thorough discussion with your doctor will help. The first few basics on laser eye surgery, read on.

Many would like to know if they are good Lasik candidate and this depends on many aspects. You’ll need to provide a thorough health history as well as have a very thorough eye examination. Your history of vision problems can be a major factor; there are certain degenerative eye conditions, autoimmune diseases and diabetes problems that may disqualify Lasik surgery as an answer to your vision problems. This is why it is imperative that you give honest answers when informing your doctor of not just your eye health, but your overall health as well.

Of course, many patients will want to know of the risks involved in laser eye surgery, and of course being knowledgeable of the risks is a part of being knowledgeable about the procedure. Some of the most common side effects of laser surgery include reduced lowlight vision, which can cause halos, and glowing effects to lit objects in low light. For the most part, patients find the Lasik procedures are extremely quick and painless, and only a minute or two is spent on each eye. Although painless, some patients do desire a mild sedative during the procedure, but almost all are able to walk out directly after laser eye surgery.

Postoperative procedures will require that you take a day or two and possibly more off from your work. It’s important to rest your eyes and staying off of your friendly computer, thoroughly involve your doctor in the decision as to when to return to work. Certain types of jobs will be at a higher risk for postoperative complications than others.

Cost is always a factor, and should be thoroughly looked into before you begin any Lasik procedure. Many insurance companies consider laser eye surgery an elective surgery and will not cover it even if you have vision insurance. It is not uncommon to spend $2000 for laser eye or Lasik surgery

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Do Prescription Eyeglasses became boring?

When I was a kid, and looking at my grandpa’s glasses, it was a prescription eyeglasses with bold thick frames in dark color with square big lenses in it. If I compare it with today, there’s so much in difference. For most people today, style and performance has been an unseparatable part of our daily life, including what we call prescription eyeglasses. Now we had better skip our nightmare about having to wear a weird old eyeglasses design like our senior’s moment.

With various choice of shopping, including online shopping like the one provided by GlassesShop.com, eyeglasses can be easily chosen in any terms we need. I wanna tell you a bit about the excitement of shopping online here, in addition to getting Discounted Reading Eyeglasses, we can browse it’s collection with only a fingertips. It is certainly a saving of time and energy of having to going out for shopping.

A High-indexted Prescription Eyeglasses can be upgraded. All the frames collection provided in this online glasses shop can be changed into prescription eyeglasses, it’s up to us which one we like. We can modify them with adding some UV rays coating to block the danger of  sunlight to our eyes. One thing for sure, we can get rid of those boring prescription eyeglasses designs.

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How to understand the glasses prescription?

The forms of the glasses prescription are in a great variety, but the basic items are the same such as name, sex, age, occupation and so on. The most important items are the nature of the sphere lens, the diopter, the refraction degree of the column lens, the axial position, uncorrected visual acuity of the right and left eyes, corrected visual acuity as well as the pupil distance.

Now I would like to tell you the meaning of the marks in the prescription.

OD / RE / R :  right eye
OS / LE / L : left eye
+ :  Convex lens   ( for the hypermetropia )
- :  Concave lens   （for the myopia）

After “ +” or“ –”  , the Arabic value is lens’ diopter, but what needs to pay attention to is that diopter in the prescription glasses and the strength of eyeglasses are not the same, a difference of 100 times between them, for instance, - 1.00D is equal to 100 degrees which we usually say;

DS :  Spherical lens （both for hyperopia and myopia ）
DC :  Cylindrical lens ( for astigmatism )

Behind DS, there is a mark “()”, representing the spherical lens “United” the following the cylindrical lens; at the back of DC, there is also a mark “×”, separating  the front degree of astigmatism from the behind the astigmatic lens axis （1～180°）;

PD :  pupil distance
For example,
Ｒ：—2.OO DS () — 2.OO DC × 90°
ＰＤ：63mm

It stands for right eye，200 degrees of myopia with 200 degrees of astigmatism, degree of astigmatism axis is 90 °, the pupil distance is 63 millimeters .

The Q and As of Glasses Know How 1

GlassesShop.com invites the authoritative eye specialists to answer these questions that everyone should know so that more and more people can understand them.

1 What is refractive index?
Refractive index is the ratio (N) between the light speed of travelling through the air and that of travelling through the lens. The higher the refractive index is; the thinner the lens would be.

2 The safe central thickness of lens (International)
Resin: 1.0MM    glass: 0.7MM
Zeiss (a brand of glasses, has its own standard)
Resin: 1.2MM   glass: 1.5MM

3 What is the relationship among Abbe number, dispersion and refractive index?
The higher the refractive index is, the lower the Abbe number is and the larger the dispersion is.

4 What are the refractive indexes of eyeglasses lens?
1.523    1.61 (Zeiss only)   1.7  1.8  1.9

5 What are the refractive indexes of resin lens?
1.499   1.56    1.61    1.67    1.701    1.74

6 What are the techniques of the resin lens?
(1) Harden
(2) Apply antireflection coating (FGMC)
(3) Apply UV coating
(4) Anti-irradiation coating (EMI)
(5) Dye

7 What is the polarized lens?
Only the light comes from one direction can travel through the polarized lens. Just as shutter, the polarized lens can filter a part of veiling glare, which makes the light tender and reduces glare so that we can see things more clearly and truly. It is especially suitable for fishing and driving.

8 What does it mean by 50 18 35?
means the representation of a box; 50 is the maximum horizontal diameter of eyeglass frames; 18 is the length of center sill; 135 is the leg length.

9 What does the CE on the frame mean?
CE is the Quality System Certification of Europe.

10 What are the advantages of aspherical lens?
(1) The appearance is more beautiful with less swirl grain.
(2) The image is clearer and more vivid, with which people are tireless.
(3) The lens is lighter and thinner.
(4) The field of view is wider.

Please post your answers and go to GlassesShop.com to see if you are right.