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Common Eye Care Questions

What is Astigmatism?

Astigmatism occurs when the cornea does not maintain a routine, ocular shape. In other words, the eye takes on the shape of football. Astigmatism may orient in any direction, which is denoted within your prescription.

When you have an undiagnosed astigmatism, you may experience eyestrain, fatigue, headaches, and blurred vision; however, this list of symptoms is incomplete as every person may experience symptoms of astigmatism differently. If you have blurred vision, schedule an eye exam with your eye care professional.

Astigmatism may occur in conjunction with nearsightedness or farsightedness. Unfortunately, untreated astigmatism may continue to worsen with age.

Contact lenses do exist for astigmatism, but they tend to be more expensive than traditional contacts. In some cases of severe, irregular astigmatism, gas-permeable, glass contacts may be required, which can increase sensitivity and itching in the affected eye.

What is the difference between myopia, hyperopia, and presbyopia?

Myopia is the medical term for nearsightedness. Myopia may occur in any form, which ranges from mild to moderate to severe. Far away objects may appear blurry, pale, or darkened. When trying to see without prescription lenses, you may have noticed squinting or frowning to attempt to see. You may even feel like squinting is normal, but it could be hiding a vision problem.

Myopia occurs when a natural or accidental change to the eye’s lens (the cornea) causes light to bend and focus in front of the retina. In a non-affected eye, light would focus directly on the retina. Myopia tends to develop between ages 6 and 12. If left untreated, myopia may worsen suddenly during the teen years as growth spurts occur.

Hyperopia is the medical term for farsightedness. Those with hyperopia have difficulty seeing objects up close, which occurs as incoming light is focused behind the retina. As a result, vision becomes blurry, unclear, or pale. Hyperopia is the result of a cornea lacking an adequate curvature to produce an image onto the retina.

In most cases of hyperopia, the condition presents during early childhood; however, many cases of hyperopia may resolve without vision correction. As the eyes age, they start to lose their natural ability to focus on near objects, which is called presbyopia.

Available Prescription Lenses

Are prescription sunglasses available with Seiko lenses?

Yes. Certain Seiko lenses are available with tints and Transitions® features. You will need to speak with your eye care professional about what types of tints may be the most beneficial for your unique, eyewear needs.

If you do opt for Transitions® lenses, make sure to check the Transitions® availability for your specific lenses type. Currently, Transitions® lenses are only available to Seiko Perfas progressive lenses and Seiko Super Singe Vision (SV) 1.67 lenses.

I feel like I’m in a strange bubble when wearing bifocals. What causes the curves and swaying appearance?

The curves and swaying in bifocal lenses are caused by changes in the curvature of the lenses as your eyes move through to view different settings. These curves are the result of combining multiple prescription strengths into different zones on the lens. Traditional bifocals contained a visually obvious center, or two, of increased prescription strength, and the wearer had to consider which part of the lens was being used. Progressive lenses eliminated this problem.

Seiko progressive lenses combine the power of bifocals into a single surface to ensure you can see the viewing area correctly without strange distortions and problems. Each lens is expertly crafted to prevent the appearance of lines and dramatic changes in quality while wearing Seiko progressive lenses. This is achieved through the seamless transition of viewing zones throughout the glasses. As a result, you do not notice sudden jumps or changes in sight, which reduces overall performance of the lens.

If you have never used no-line bifocals before, the difference is like night and day. You will be able to go about life without the constant upset and disorientation caused by traditional progressive lenses.

I didn’t see my prescription on the website. Is it not available, or am I missing something?

Seiko lenses can be fitted to hundreds of different prescriptions. While viewing the site, your specific prescription may not have been listed; however, each lens includes a range of vision correction, so you will need to know your exact prescription. Afterward, look through selection of lens to find the type of lens with a range for your prescription.

If you are unsure as to your exact prescription strength, besides knowing if you wear progressive or single vision lenses, you may need to obtain a copy of your prescription from your eye care professional. If you are still unable to find your prescription, contact Seiko today, and a representative will be able to help you sort through the available lenses.


Does Seiko offer scratchproof glasses?

Seiko offers an array of antireflective treatment options to reduce the chances of damaging your lenses; however, excessive force may damage the lens and result in failure of the scratch-resistant coating. Your glasses should never be exposed to excessive force, but the scratch-resistant coating will help prevent damage from minor problems.

For example, dropping your glasses outdoors or indoors, walking through dense foliage, or leaving your glasses unattended are the situations for which the treatment was designed. Furthermore, Seiko’s commitment to quality ensures your glasses will retain durability through many different scenarios. The frames and lenses are designed to be extremely lightweight, which helps to reduce the incidence of scratching. 

What’s the difference between scratch-resistant and scratchproof glasses? Aren’t they the same thing?

It’s important to remember than scratch-resistant does not mean the glasses cannot be scratched. Your glasses are how you see, so you should care for you glasses in the same way you would care for your medications.

  • Keep your glasses out of the reach of children.
  • Return your glasses to the case when you’re not wearing them.
  • Do not use abrasive materials to clean your glasses.
  • Ensure your glasses are an appropriate fit for your facial features.
  • Do not allow others to borrow your glasses. Wearing an incorrect prescription for even a short amount of time may result in damage to the eyes.

Eyeglass Care

How do I clean my glasses?

If you properly and routinely clean your glasses, your investment will last much longer. Regardless of glass or plastic lenses, you must take care when cleaning glasses to ensure they do not break. To remove minor smudges, use a dry, clean cloth to wipe the front and back of the lenses gently. Avoid rubbing in a circular motion as this may cause scratching.

If your glasses have an excess of debris or have a sticky residue, you will need to clean them with soap and water.

Run your glasses under warm water, and apply a small amount of a mild soap to the lenses. Avoid using soaps with rough, raw materials or exfoliating beads. Run the soap over the lenses. If excess dirt or debris are on the lenses, do not push against the materials as this may scratch the lenses. Rinse with warm water. For exceptionally dirty lenses, you may need to repeat this process. Leave your glasses to air-dry, or use a soft towel to dry them. Do not use paper towels for drying your glasses.

Some sprays are available to clean your glasses. These sprays may be used in conjunction with a dry, lint-free cloth or instead of using soap. Do not bend the frame or attempt to remove the lenses while cleaning your glasses as well.

Can glasses be adjusted after I receive them?

The frame of your glasses can be adjusted after you receive them. Most eye care professionals will perform this service for you; however, individual policies between practices may vary. The actual prescription of your glasses cannot be altered after you receive them.

Prescription glasses are created by taking a given lens and buffing away the excess material until the exact strength-requirements have been met across the lens. For example, the lens may be thicker or thinner in different areas to address nearsightedness, farsightedness, or presbyopia.

Questions About Prescriptions

Will my progressive glasses become blurry at sunset or sunrise?

If your progressive lenses become blurry, ensure they do not have any debris on them first. Your progressive lenses are designed to filter out bright lights, but staring into the sun directly will cause blurred vision. Furthermore, changes in humidity, such as walking from a cold environment into a humid, warm area may cause the glasses to fog temporarily. This is normal, and any such fog should be removed with your eyeglass cleansing cloth.

If you have a pair of Seiko progressive Transitions® lenses or a pair of tinted progressive lenses, the blurring at sunset or sunrise will be greatly diminished. Remember to remove tinted, non-Transitions® lenses after sunset as tinted lenses may affect your ability to move around in darker times. Transitions® lenses will adjust automatically to different light levels, so you can seamlessly move from dark to bright areas without needing to switch between tinted and clear lenses.

I can see things that are far away, but I can’t see things near me. Should I consider progressive or single vision lenses?

You most likely have a case of hyperopia.; however, hyperopia may occur at the same time as astigmatism. Single vision lenses may be your best option.

Single vision lenses function by adding an additional layer of vision correction to your existing eye’s abilities. As a result, you can see things that are near you with the glasses, and you will be able to naturally focus on objects far away.

Progressive lenses, which combine multiple vision correction strengths into one lens with different zones, may be your best choice if you suffer from presbyopia. However, you will need to speak with your eye care professional about the best option for the specific shape of your eye.

My eyes become tired while working and wearing my glasses. What can I do to help with this problem?

Depending on your specific vision problems, you may experience headaches, fatigue, and dizziness when wearing glasses for long periods of time, especially while working in a desktop setting. This is caused by your eyes readjusting to the distance between the surface of your desk and your computer. The options for correcting this problem may include rearranging your desk’s surface or limit the number of screens and documents you view throughout the day.

If neither of these solutions works, you may want to consider a pair of PCWide lenses. These lenses expand your current vision field to include more peripheral zones and enhance the clarity of objects at a larger, yet near distance. In other words, your eyes can shift between a computer screen and a written planner easily and without distortion.

I’ve seen inexpensive glasses at the drug store. Will reading glasses correct my vision?

The answer to this question is complicated. If you happen to have the exact prescription of the reading glasses, the exact point of focus for your pupil, and the appropriate distance between lenses in drug-store reading glasses, you may be able to see clearly with them.

Unfortunately, the chances of having all of these factors mesh are minimal at best. Wearing reading glasses does not address many of the common complaints for poor vision. If you suffer from presbyopia, reading glasses are not going to help you see throughout the day.

Specifically, reading glasses can actually cause harm. Your eyes may become fatigued, which will lead to poor coordination and an increased incidence of being involved in an accident. Reading glasses may also contribute to poor cognition and headaches. Your mind becomes tire, your eyes become tired, and your reading glasses become worthless.

You must also think about the prescription of reading glasses. The manufacturers of reading glasses mass produce prescription strengths without the consideration for the unique needs of your eyes. The simple + or - indicator on the reading glasses only gives a generic indication of alternative options to a real pair of frames and prescription lenses.

My prescription shows several different numbers? Do I add them together to get my prescription, or do they mean something else?

Each number in your prescription tells the optician exactly what type of lens will give you the most clarity, precision, and sharpness in your glasses. If you take a typical lens prescription, you will notice that it contains three numbers. In some cases, these numbers may be drastically different or similar, which depends on the unique needs of your eyes. Also, your prescription may vary from your right to left eye.

The first number in the prescription reveals the spherical refractive error in your eye, which indicates farsightedness or nearsightedness. If a minus sign is present before the first number, this indicates nearsightedness. If the positive sign appears before the first number, you have farsightedness.

The second number in the prescription indicates whether or not you have astigmatism. If you see DS or SPH in the space where the second number goes, you do not have astigmatism.

The third number indicates the direction of the astigmatism. This number is between 90 and 180, which shows the direction of the astigmatism, which is used in determining the type of lenses needed for your eye.

Your prescription may contain additional numbers, such as superscripts for prism correction. If you need bifocals, you will also see an additional range after the previous number. Essentially, you may have up six different numbers in your prescription.

My current pair of glasses makes my eyes very dry. Will Seiko lenses help my eyes?

When your glasses are not the appropriate prescription, your eyes may become excessively tired and dry. Furthermore, squinting to see fine print and detail may further cause dry eyes.

Seiko lenses can help reduce dry eyes by providing you with an exact prescription for your glasses. The lightweight, thin designs of many of Seiko’s lenses help improve airflow between your eyes and your glasses, which will help keep your eyes moistened. Also, this airflow helps to encourage blinking, which bathes your eyes in a coating of your natural tears.

If you suffer from excessively dry eyes, speak with your eye care professional. Certain medications, eye drops, and treatment options may be available to help with chronic dry eyes.

More About Progressive Lenses

I have a hard time seeing while I’m at work, but my doctor says that I don’t need progressive lenses. What Seiko lenses would be best for me?

What’s causing the trouble seeing while you are at work? Do the lights in the office trigger tiredness of your eyes, or are you having trouble seeing what’s at your workstation? The answer to these questions will help in determining the best type of Seiko single vision or progressive lenses for you.

If your eye care professional does not believe you need progressive lenses, you may need to consider single vision lenses. Alternatively, you may want to think about Seiko Super Atoric SVFF or Seiko PCWide lenses. More information about these lenses can be found on the “About the Lens” page.

I read somewhere that progressive lenses were only for mid-aged to elderly people. Is this true, and why might I need progressive lenses at a younger age?

Progressive lenses are typically used when the eyes change shape due to age; however, changes in the shape of the eye may occur for a variety of reasons at any age. An accident or injury to the eye may result in the need for progressive lenses. At other times, severe astigmatism or premature presbyopia (blurring of the eyes due to age) may warrant the need for progressive lenses.

If you’re concerned about the lines in bifocals, rest assured, Seiko no-line progressive lenses could give you superior vision across several different strengths within one lens. So, your progressive lenses will appear no differently than any other pair of single vision lenses. What makes them different is the technology in the lenses, not the way they look.

Questions About Getting My Prescription

It’s been a while since I visited my eye care professional. How long is my prescription good for?

In most cases, an eyeglass prescription is good for a period of two years. Unfortunately, some eye care professionals may require a prescription within the past year for obtaining a new pair of glasses. Check with your eye care professional to determine if you need a new prescription before ordering Seiko lenses. After all, you want to make sure that your current prescription is as accurate as possible to help reduce future eye problems.

I wear contacts, but I want to purchase a pair of Seiko lenses. Do I have to get a new prescription, or can you get my glasses prescription from my doctor?

As with the prescription for glasses, individual policies for the length of time for a prescription to be considered valid may vary. Most contact lens prescriptions are valid for a time period of one year, and most include a prescription for glasses. Some eye care professionals may charge extra for a separate prescription for glasses. Check your eyewear prescription for a box that says, “Glasses.” If you see two different setsone for glasses and one for contactsof prescribing information, you have a prescription for glasses.

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