Dr. Mark Hornfeld
New York City-based ophthalmologist offers complete eye examinations and counseling on vision ailments. Call to schedule an appointment today at (646) 681-3100.

A Journey through the Human Eye: How We See

As complex and valuable as our eyes are, people take them for granted and do not understand how they work. A self-sustaining system, the human eye is a natural marvel. So, how exactly do we see? Watch this fascinating video clip on how our eyes work to find out.

Reflected light enters the cornea, aqueous humor, lens, and vitreous humor, then projects onto the retina’s photoreceptors. The photoreceptor impulses converge on the optic nerve, travel to the brain, and transform the impulses into the imagery we are beholding through our eyes.

Our sight is an amazing process that we either take for granted, or wish we could improve through various forms of laser eye corrective surgeries. Dr. Mark Hornfeld provides expert ophthalmic care at Vista Laser Vision in New York City. Please call us to make an appointment and discuss your laser vision correction options at (212) 580-8881.

PRK Laser Eye Surgery vs. LASIK

If you are considering laser eye surgery, you are not alone. Many people worldwide have already undergone laser eye surgery. With ophthalmic technology making such rapid advancements, staying current on what available procedure is best for you can be tricky. If you are considering eye surgery and wondering what the difference is between PRK laser eye surgery and LASIK surgery, look no further.

eye exam

  • LASIK is newer. PRK, or photorefractive keratectomy, was once the most common refractive procedure. Invented in the early 1980s, PRK wasn’t approved by the FDA until 1995. LASIK (laser-assisted in situ keratomileusis) came a few years later and replaced PRK as the most popular laser eye surgery technique.
  • LASIK patients experience less discomfort. Both PRK and LASIK use excimer lasers to reshape the cornea. The LASIK procedure creates a corneal flap prior to reshaping the cornea, whereas PRK does not. Nevertheless, LASIK patients report less pain and discomfort the first few days after surgery than PRK patients do.
  • LASIK patients heal more quickly. A complete visual recovery takes PRK patients a few weeks, whereas many LASIK patients achieve full visual recovery in a number of days. While everyone heals differently, many patients report clear vision almost immediately after the procedure, and it can take as little as a week for full clarity to set in.

In other ways, the procedures are quite similar. Both PRK and LASIK are outpatient procedures that take about 30 minutes to complete for both eyes. Both procedures are effective for nearsightedness, farsightedness, astigmatism, and presbyopia.

If you live in New York City and have questions about which kind of laser eye surgery is right for you, please call Dr. Mark Hornfeld at (212) 580-8881. At Vista Laser Vision, Dr. Hornfeld helps you get rid of the glasses by providing excellent ophthalmic care for patients with all kinds of visual ailments.

Cataracts: What They Are and How They Can Be Treated

A cataract is a clouding of the eye’s internal lens, which helps focus light as it enters the pupil. Cataracts make your vision foggy and blurry, especially in dim light. They prevent sharp focus and a general difficulty seeing, especially at night or when reading text. Cataracts can also cause problems with both near-sided vision and distance vision. Smoking, UV exposure, and diabetes can be risk factors for the faster development of cataracts, though age is the main cause of developing cataracts. For further information, watch this informative video.

If you have more questions about cataract surgery or would like to schedule an appointment to discuss your options, call Dr. Mark Hornfeld with Vista Laser Vision at (212) 580-8881. Based in New York City, we are happy to help you reach your vision goals with procedures such as cataract surgery, laser glaucoma relief, and many other visual impairment treatment options.

How Crystalens and Accommodating IOLs Compare to Multifocal IOLs

Nearly 22 million Americans over the age of 40 suffer from cataracts, according to the American Association of Ophthalmology. If you require cataract surgery, there is good news: New advances in IOLs (intraocular lenses) can help you to see with perfect clarity again. Advanced technology IOLs (artificial lenses implanted in the eye) have two separate methods: one called accommodation, and the other called multifocal. Currently, Crystalens is the only FDA-approved accommodating IOL. How does Crystalens compare to multifocal IOLs? Let’s take a look:

Crowd of Business People, Businessman Using Mobile Phone, Blurred Motion

  • Accommodating IOLs such as Crystalens improves eyesight by shifting with eye movement. In all IOL procedures, after the eye’s natural lens is removed, an artificial lens is implanted in its place. A multifocal IOL’s space is divided into zones. The brain learns to “look” through the correct zone for near, intermediate, and far distances. However, an accommodating IOL, made up of just one focusing zone, shifts position with eye muscle action and movement, which enables focus at multiple distances.
  • Accommodating IOLs provide better contrast sensitivity. An extremely important measure of good vision, contrast sensitivity is your ability to distinguish between objects and their backgrounds. In low-light settings, such as driving at night or in fog, contrast sensitivity is essential.
  • Accommodating IOLs cause fewer visual side effects than multifocal IOLs. Multifocal IOLs have been known to produce unpleasant side effects, such as glare, halos, and other night vision problems. Many patients also report crisper long-distance vision with accommodating IOLs like Crystalens.

For more information on accommodating IOLs and multifocal IOLs, please call Dr. Mark Hornfeld’s Vista Laser Vision clinic in New York City at (212) 580-8881. We will be happy to give you more information or schedule an appointment.

Learn More About the Procedures Available For Correcting Your Vision Problems

Our recent blog posts have a lot of great information on the medical procedures available for correcting vision problems. Dr. Mark Hornfeld specializes in laser vision correction for a number of different visual ailments. These links contain useful information about various eye conditions and the treatment options available. To inquire about our eye treatment services in New York City, call Dr. Mark Hornfeld at (212) 580-8881.

resource highligted in dictionary

  • Nearsightedness is a condition that makes it difficult to see objects clearly when they are far away. To learn more about nearsightedness, check out this article from the American Optometric Association.
  • Do you suffer from cataracts? Read this page from MedicineNet.com to learn how cataract surgery can improve your vision.
  • Although cataract surgery can help improve your vision, it is important to know whether you are a candidate for the operation. To find out more, check out this informative webpage.
  • To learn about astigmatism and how it can cause blurry vision, take a look at this article.

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