Articles

Thanks to the advancement of lens technology, glasses lenses are no longer a single, one size fits all solution. There are a variety of different lens types that can be used in glasses, giving patients greater flexibility and control over their vision than ever before.

Single Vision Lenses

Also known as monovision lenses, these lenses are designed to correct the wearer’s vision at just one distance, and have a single prescription covering the entire surface of the lens. They are most often recommended for people who are either nearsighted (myopia) or farsighted (hyperopia) and who need glasses for a specific activity, such as driving or reading.

Progressive Lenses

Progressive lenses are multifocal lenses that can correct a patient’s vision at different working distances, ranging from far distance to reading distance. However, rather than designating different areas on the lenses for different distances with visible lines separating them, progressive lenses have a gradual change so that the wearer can smoothly transition from one lens power to another.

Bifocal and Trifocal Lenses

As you may have guessed from the name, bifocal and trifocal lenses have either two or three lens powers depending on which type you choose. Bifocal lenses support distance vision in the top half of the lens, and near vision in the lower half. Trifocal lenses support distance vision in the top third of the lens, intermediate vision in the middle segment and near vision in the bottom third. Whichever variety you choose, you will see visible lines separating each segment.

Bifocal and trifocal lenses are recommended for patients who are near or farsighted, and those who develop presbyopia, which is the natural hardening of the eye lens, that occurs as we get older. Presbyopia makes it harder for the lens of the eye to adapt to focus at different distances.

Multifocal Lenses

Multifocal lenses are the alternative name given to bifocal, trifocal and progressive lenses.

Cataracts are a common eye condition that can significantly affect your vision. They occur when the lens of your eye becomes cloudy, causing blurred or distorted vision. This clouding is typically a result of aging, but other factors such as genetics, diabetes, or prolonged exposure to sunlight can also contribute to the development of cataracts.
 

As cataracts progress, you may experience symptoms such as difficulty seeing at night, increased sensitivity to glare, or a decrease in color perception. These changes can make daily activities like reading, driving, or recognizing faces more challenging.

Why Cataract Surgery May be Necessary

Cataract surgery is often recommended when cataracts start to interfere with your vision and affect your ability to perform daily tasks. The primary goal of cataract surgery is to remove the cloudy lens and replace it with an artificial intraocular lens (IOL).
 

The decision to undergo cataract surgery is a personal one and should be made after consulting with your optometrist. Factors such as the severity of your cataracts, your overall eye health, and your lifestyle requirements will be taken into consideration when determining if surgery is necessary.

What is Cataract Surgery Co-Management?

Cataract surgery co-management refers to the collaborative approach between an ophthalmologist, who performs the surgery, and an optometrist, who provides pre-operative and post-operative care. This partnership ensures that you receive comprehensive eye care throughout the entire process, from the initial consultation to the final follow-up appointments.
 

Your optometrist plays a crucial role in cataract surgery co-management by conducting a thorough pre-operative evaluation to assess your overall eye health and determine the most suitable IOL for your specific needs. They will also provide guidance and education on the surgical procedure, address any concerns you may have, and help you make informed decisions about your eye care.

Contact lenses have become a popular choice for individuals who want to correct their vision without the hassle of wearing glasses. Traditional contact lenses have been around for decades, offering a convenient alternative to eyeglasses. However, advancements in technology have given rise to a new type of contact lens – hybrid contacts.
 

What Are Hybrid Contacts?

Hybrid contacts are a revolutionary type of contact lens that combine the best features of both soft and rigid gas permeable (RGP) lenses. The rigid center corrects vision by providing precise clarity, while the soft skirt offers comfort and stability. This unique combination allows for the benefits of both types of lenses to be experienced simultaneously.

The central RGP lens of a hybrid contact is made from a rigid material that allows oxygen to pass through to the cornea, ensuring ample oxygen supply to the eyes. This ensures the overall health of the eyes, preventing dryness and reducing the risk of complications associated with limited oxygen flow.

Astigmatism is a common refractive error that occurs when the cornea or lens of the eye is not perfectly spherical. Instead of having a uniform, rounded shape, the cornea or lens has a slightly more curved or irregular shape, resembling more of an oval or football-like appearance.

This irregular shape causes light to bend or refract unevenly as it enters the eye, leading to blurred or distorted vision. Astigmatism is often present from birth, but it can also develop later in life due to various factors, such as eye injuries, certain medical conditions, or the natural aging process.
 

Common Symptoms of Astigmatism

If you have astigmatism, you may experience a range of symptoms that can impact your daily life. Some of the most common symptoms of astigmatism include:

• Blurred or distorted vision, especially at a distance or when reading

• Difficulty seeing clearly at night or in low-light conditions

• Frequent headaches or eye strain

• Sensitivity to glare or bright lights

• Double vision or the appearance of halos around lights
   

These symptoms can vary in severity and may become more pronounced over time, especially if the astigmatism is left uncorrected.

Optical Coherence Tomography is a non-invasive imaging test that may be performed as a standard part of your regular, comprehensive exams, or you may be able to request this test as an addition to your usual exam.

Optical Coherence Tomography uses light waves to take cross-section images of your retina, which is the area of light-sensitive cells at the back of your eye that is responsible for receiving light and transmitting it into messages that are sent up to the brain. The technology behind OCT enables your eye doctor to see each of the different layers that make up the retina. By being able to see these and measure them, they can obtain a much clearer picture of the overall health and condition of your eyes.
 

Why are Optical Coherence Tomography scans important?

When you choose to have an OCT scan at fairly regular intervals, such as during your normal comprehensive eye exams, your eye doctor can compare newer results to previous ones. This helps them to build up a picture of the health of your eyes, and spot any changes which may be concerning, early, before they cause symptoms or have a permanent effect on your vision. 

Anyone can have an OCT scan, but they are particularly recommended for patients over the age of 25 who are concerned about the health of their eyes, or who are at risk of or already have diabetes, glaucoma or a family history of eye disease. This is because they can be used to spot the early signs of a range of eye diseases, including glaucoma, diabetic retinopathy, macular degeneration, disorders of the optic nerve and more – even before you realize that you are affected.

In September 2025, the FDA approved Stellest lenses for children ages 6 to 12 to correct and manage myopia, a major milestone for myopia care. These lenses have been successfully used in countries across Europe, Canada, and Asia since 2020, showing promising results in slowing eye growth associated with myopia.
 

The Importance of Early Myopia Management

Myopia typically begins in early childhood, often between the ages of 6 and 10, and tends to worsen quickly during the school years as children spend more time reading and using digital devices. The sooner it begins, the higher the risk that it will progress to more severe levels. Every increase in myopia level significantly raises the risk of eye health complications later in life, such as retinal detachment or glaucoma.

By beginning myopia management as soon as possible, parents can help slow eye growth and protect long-term vision. With innovative options like Stellest lenses, families now have effective, science-backed solutions to take control of their child’s myopia.
 

What Are Stellest Lenses?

Stellest lenses are a groundbreaking innovation in myopia control, developed by Essilor. They look like regular eyeglass lenses but are designed with specialized optical technology to both correct vision and slow the progression of myopia.

If you find it difficult to tell colors apart, you may be color blind. Color blindness, or color deficiency, is estimated to affect around 8% of men and about 1% of women, but for those affected, it can significantly impact the quality of their day-to-day life. Contrary to popular belief, being color blind doesn’t mean that you can’t see any color at all. Instead, patients simply struggle to differentiate between certain colors. The vast majority of people who are color blind find it impossible to tell the difference between varying shades of red and green. You may hear this referred to as red-green color deficiency. However, this doesn’t only mean that they mix up red and green. They can also mix up colors that have some green or red light as part of their whole colors, for example purple and blue. This is because they are unable to see the red light that forms part of the color purple. 

As you can probably imagine, this type of visual impairment can be a problem for things like traffic lights, taking medications and even looking at signs and directions. For example, someone who is color blind may find that the green on a traffic light may appear white or even blue.

Senior eye care is crucial for maintaining optimal vision and overall eye health as we age. As individuals grow older, they become more susceptible to age-related eye conditions. Regular comprehensive eye exams play a key role in early detection and management of these conditions, helping to preserve vision and prevent potential vision loss. By staying proactive with eye care and seeking timely professional assistance, seniors can enjoy clear, comfortable vision and ongoing eye health for years to come.
 

Common Eye Conditions in Seniors

As we reach our golden years, there are several eye conditions that become more prevalent. These conditions can have a significant impact on our vision and overall quality of life.

• Presbyopia: This condition affects near vision, making it difficult to focus on close objects. It is a normal part of aging and is typically addressed with reading glasses or multifocal lenses.

• Floaters and Flashes: As the vitreous inside the eye changes with age, it can lead to the perception of floaters (small dark spots or lines) and flashes of light. While often harmless, sudden onset of floaters and flashes may indicate a retinal tear or detachment and should be promptly evaluated.

• Age-Related Macular Degeneration (AMD): AMD is a leading cause of vision loss in older adults. It affects the macula, the central part of the retina, leading to blurred or distorted central vision. There are two forms of AMD, dry AMD, and wet AMD, with the latter being more severe.

• Cataracts: Cataracts are a common age-related condition characterized by the clouding of the eye's natural lens. This can lead to blurry vision, glare, and difficulty seeing in low-light conditions.

• Glaucoma: Glaucoma is a group of eye conditions that damage the optic nerve, often due to elevated intraocular pressure. It can result in peripheral vision loss and, if left untreated, may lead to total blindness.

• Diabetic Retinopathy: For seniors with diabetes, diabetic retinopathy is a concern. It occurs when high blood sugar levels damage the blood vessels in the retina, leading to vision problems and potential blindness if not managed.

• Dry Eye Syndrome: Seniors may experience dry eye syndrome, characterized by insufficient lubrication and moisture on the surface of the eye. It can cause discomfort, redness, and fluctuating vision.

A tonometer refers to the equipment that is used in tonometry – a test that measures the pressure inside your eyes, also known as intraocular pressure or IOP for short. Tonometry is rarely performed at your average comprehensive eye exam unless you are at high risk of or have been already diagnosed with glaucoma. Fortunately, tonometry can be used to detect changes in eye pressure before they cause any symptoms, enabling prompt action to be taken before your vision is affected.
 

About Glaucoma

Glaucoma is a common eye condition that occurs when the optic nerve, which connects the eye to the brain, becomes damaged. It’s normally caused by fluid building up in the front part of the eye, which causes the pressure inside the eyes to build. As the pressure increases, the optic nerve becomes increasingly damaged, and this prevents messages from being transmitted between your eyes and brain effectively. As a result, the patient’s vision becomes compromised. Without treatment, the level of vision loss will continue to increase. Unfortunately, any vision that has been lost as a result of glaucoma cannot be restored.

Most of the time, glaucoma develops very slowly which means that many people don’t realize that they are affected until some damage to their vision has already occurred. However, occasionally glaucoma can develop quickly, and symptoms do occur.
 

Glaucoma symptoms can include:

• Red eyes

• Intense headaches

• Tenderness around the eyes

• Eye pain

• Seeing rings/halos around lights

• Blurred vision

• Nausea and vomiting
   

If you notice any of these symptoms, it’s important that you make an appointment with your eye doctor right away so that you can be assessed. You are likely to have a tonometry test as part of this assessment.

If you’ve been diagnosed with glaucoma, you’re probably already familiar with the typical options in glaucoma treatment – eye drops, laser treatment, or traditional surgery. While these are certainly effective, especially when glaucoma is diagnosed early, researchers have been working hard to offer new glaucoma treatments. Their goal is not only to improve outcomes but also reduce the treatment’s side effects and frequency of use.
 

What is the Goal of Glaucoma Treatment?

Before we dive into the new options, it’s important to understand the goal of any glaucoma treatment. At present, glaucoma is not curable. However, treatment can significantly slow the progression of the disease. Glaucoma damages your eye's optic nerve. Extra fluid builds up in the front part of your eye (cornea), which increases the pressure in your eye. Reducing this pressure is the primary objective of any glaucoma treatment. This is often referred to as intraocular pressure or IOP.
 

What are the Limitations of Standard Glaucoma Treatments?

Eye drops for glaucoma treatment seem like an easy option, but several challenges can reduce their effectiveness. It can be difficult to get all the medicine in the eye, especially for older adults with less of a steady hand. In addition, since it must be applied daily, individuals may forget. Since the drops have no perceivable benefit because early stages of glaucoma have no symptoms, patients might make it a lower priority, which is understandable since it may also have unpleasant side effects like burning, red eyes.

Beyond eye drops, laser surgery is a less invasive option. The laser opens clogged tubes and drains fluid. It can take a few weeks to see the full results. If laser surgery or drugs don’t relieve your eye pressure, you may need a more traditional operation. You would have to go into the hospital and will need a few weeks to heal and recover. Although usually effective, glaucoma surgery can make you more likely to get cataracts later on. It can also cause eye pain or redness, infection, inflammation, or bleeding in your eye.
 

What are Recent Advances in Glaucoma Treatment?

Alternatives or Improvements to Eye Drops

The Glaucoma Research Foundation reported several new developments on the horizon. These technologies focus on reducing patient error in applying eye drops, which would make the medication more effective and improve the quality of life for the patient. Here are some of the products underway:

• A polymer, like a contact lens, would contain the drug; it would sit under the eyelid and release the medication over several months

• Microneedles would inject medication into a specific spot to be most effective

• Implantable extended-release devices using engineere,d highly precise microparticles and nanoparticles

• Polymer-based intraocular delivery technologies that would allow customizable sustained release

• Drops that allow the medication to get into the eye more easily

• Tear duct plugs that release medication
   

In addition, people with glaucoma who take more than one eye drop per day are beginning to see those medications available as a single, combined eye drop. New products include Cosopt (timolol and dorzolamide), Combigan (timolol and brimonidine), and Simbrinza (brinzolamide and brimonidine).