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Glaucoma vs Cataracts: What’s the Difference?

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Our team at Cherry Creek Eye Physicians & Surgeons knows how important it is to understand what’s happening with your vision. If you’ve heard the terms glaucoma and cataracts but aren’t sure what these conditions involve, we’re here to help explain the difference.

The main difference between cataracts and glaucoma is that a cataract is a clouding of your eye’s lens, while glaucoma involves damage to your optic nerve. Both conditions can develop slowly, making regular comprehensive eye exams important for your health.

What Are Cataracts & Glaucoma?

A Cataract Is a Cloudy Lens

Inside your eye, you have a natural lens that helps focus light so you can see clearly. A cataract forms when proteins in this lens start to clump together. This clumping process creates a cloudy area.

Over time, this cloudiness can expand and make your vision look foggy, almost like you’re looking through a dusty window. It also affects how you see colors, often making them appear faded or less vibrant than they once were.

Glaucoma Is Optic Nerve Damage

Glaucoma is a condition related to the pressure inside your eye—known as intraocular pressure. When this pressure gets too high, it can harm the optic nerve, which is the connection that sends visual information from your eye to your brain. You can learn more about this complex eye disease from the National Eye Institute.

This damage disrupts the signals your brain receives, leading to a gradual loss of vision. Because the optic nerve is so important, any harm to it can have a significant effect on your sight.

How Do the Symptoms Compare?

Common Signs of Cataracts

You may not notice a cataract right away, but as it grows, the signs become more apparent. You might experience:

  • Blurry, dim, or clouded vision
  • Faded or yellowed colors
  • Sensitivity to light & glare

Common Signs of Glaucoma

Glaucoma is often called a “silent” condition because it can progress without you noticing any changes. The signs are often subtle and can include:

  • Lack of symptoms in early stages
  • Slow loss of your peripheral (side) vision, which can be measured with visual field testing
  • Sudden eye pain or nausea in rare cases

Understand Your Risk Factors

Who Is at Risk for Cataracts?

Certain factors can increase your likelihood of developing cataracts. Your risk may increase with the following factors:

Who Is at Risk for Glaucoma?

Your personal and family health history can play a part in your risk for glaucoma. Common factors include:

  • A family history of the condition
  • Being over the age of 60
  • Previous eye injuries or surgeries
A smiling senior woman with short grey hair and black-framed glasses standing with arms crossed in a lush green park.

How Are Cataracts & Glaucoma Treated?

Treat a Cataract

If you have a cataract, the right approach to care depends on how much it affects your daily life. Options can include:

Manage Glaucoma

The goal of glaucoma management is to lower the pressure in your eye to help protect your optic nerve. This can be done through:

Why a Professional Eye Exam Matters

Because both cataracts and glaucoma can develop slowly, you might not realize there’s a problem until your vision is already affected. An accurate diagnosis is important for determining the cause your vision changes and how to move forward.

Early detection gives you more options and helps protect your sight. A comprehensive examination with your eye doctor in Denver can help identify these conditions and determine a care plan that’s right for your needs.

Understanding the health of your eyes is simple with the right support. Our team at Cherry Creek Eye Physicians & Surgeons is here to provide you with clear information and patient-focused care. Schedule your appointment to discuss your vision today.

Written by Stuart Lewis, M.D., F.A.C.S., Rachel Lewis, O.D., & Tammy Gray, O.D.

Stuart Lewis, M.D., F.A.C.S.

Dr. Stuart Lewis moved to Denver in 1979 after receiving his Bachelor of Arts in neurobiology and behavior from Cornell University in 1974, earning his Doctor of Medicine from George Washington University in 1978 and completing an internal medicine internship at Northwestern University in 1979. At the conclusion of his ophthalmology residency at the University of Colorado in 1982, he entered private practice.

Dr. Lewis was board-certified by the American Board of Ophthalmology in 1983 and was elected to be a Fellow and Diplomat of the American Academy of Ophthalmology in 1984. In 2018, he was selected as a Lifetime Member of the American Academy of Ophthalmology.

Dr. Lewis has been an active community member in Denver, having built the Cherry Creek Eye Center in 1985, one of the first inclusive Eye facilities in Denver, and created Cherry Creek Eye Physicians & Surgeons, P.C. He has served on various boards, including the Investigational Research Review Board at Rose Medical Center, and was an original board member at Harvard Park Surgical Center.

Dr. Lewis served at least 2 terms as Chairman of the Department of Ophthalmology at Rose Medical Center. He also holds a position as Assistant Clinical Professor in the Department of Ophthalmology at the University of Colorado eye residency program and was a Visiting Professor of Ophthalmology at the Elias Santana Hospital in the Dominican Republic.

In 2018, Cherry Creek Eye Physicians and Surgeons, P.C. was listed as the 36th highest-rated business in Colorado based on patient reviews by “Top Rated.” Dr. Lewis is an active alpine and cross-country skier, bicyclist, and golfer. He also enjoys travel, birding, bridge, and opera.

Rachel Lewis, O.D.

Dr. Rachel Lewis is a highly skilled optometrist contributing her passion for eye care and a wealth of experience to Cherry Creek Eye Physicians & Surgeons, P.C.

Dr. Lewis earned her Doctor of Optometry degree from New England College of Optometry in Boston, MA. Before pursuing her optometry degree, she completed a Pre-Health Post Baccalaureate Program at New York University and University of Colorado Denver. She holds a Bachelor of Arts in Political Science from Amherst College and spent time studying abroad at Université de Grenoble in France.

Her area of practice is comprehensive primary eye care, with a focus in ocular surface diseases such as dry eye and keratoconus. Her practice also includes contact lens services (specialty, multifocal and soft contact lens fittings), myopia control, glaucoma management, pre-operative evaluations and post-operative care for a wide range of procedures.

Dr. Lewis is deeply committed to public service and has volunteered her expertise at the Colorado Coalition for the Homeless, Stout Street Eye Clinic. She has also traveled to Honduras on a medical mission trip to provide primary care services and eyeglasses to underserved communities.

Outside of her practice, Dr. Lewis enjoys spending time with her husband and children. She takes advantage of the Colorado lifestyle as much as possible with outdoor activities including skiing, camping, tennis and golf. She is also passionate about experiencing other cultures through travel and cuisine.

Whether you are seeking routine eye exams, specialized contact lens fittings, or the management of complex ocular conditions, Dr. Lewis is here to help.

Tammy Gray, O.D.

Dr. Tammy Gray has been a key member of the Cherry Creek Eye Physicians & Surgeons team since 2012 and has practiced in Colorado since 2008. Her blend of professionalism and personal warmth makes her a valued member of our team and community.

After earning her Doctor of Optometry degree from the New England College of Optometry in Boston, MA, in 2006, Dr. Gray honed her skills with a residency in Ocular Disease and Surgical Co-Management at Eye Care Associates of Nevada. Her journey into optometry was built on a solid foundation with a Bachelor of Science degree in Microbiology from Colorado State University in Fort Collins, CO.

Dr. Gray is passionate about providing comprehensive primary eye care, focusing on anterior segment diseases, like keratoconus and dry eye, and fitting scleral contact lenses.

Outside the office, Dr. Gray loves spending quality time with her husband, son, and extended family. She’s a supportive sports mom, cheering on her son at his sporting events, and relishes the joy of movies, live theatre, reading, and exploring new places through travel.

More Articles By Stuart Lewis, M.D., F.A.C.S., Rachel Lewis, O.D., & Tammy Gray, O.D.
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