Toric Calculation

One component of a glasses prescription is the astigmatism. There is a lot more to astigmatism than how it manifests in a glasses prescription, but it is an informative simplification to think about it as part of the glasses prescription. The other major component of a glasses prescription is the degree of nearsightedness or farsightedness.…

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Caffeine And Dry Eye

It makes sense to me that hydration status is important to dry eye status. I often encourage patients to make sure that they are drinking water as part of a comprehensive approach to dry eye. As caffeine is a diuretic, its use doesn’t seem to be compatible with dry eye. In the February 2023 edition…

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I lost my record

Well… it probably was never my record in the first place. Years ago, I had a patient who had seen three previous ophthalmologists for eye discharge. I saw her, and I made a startling discovery–she had 14 contact lenses on her eye! Whether this was a record or not is unclear at best. In the…

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Men and Keratoconus

Keratoconus is a disease of the eye in which the cornea, the very front part of the eye, becomes misshapen. Specifically, the cornea becomes more and more cone-shaped. Dr. Tessnim Ahmad and colleagues published a study in the Journal Cornea in January 2023. Their study concerned correlates of progression of keratoconus. One of the findings…

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Charles Bonnet Syndrome

Charles Bonnet syndrome is the term that is used to describe visual perceptions without physical substrate in the setting of poor ocular health. Basically, the eye that does not function well sends incomplete/inaccurate data to the brain, and the brain “conjures up” images by trying to create sensible images out of that imperfect data. In…

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Space Nerves

People who complete long missions into Space can get swelling of their optic nerve in the eye. The optic nerve is the “cable” that connects the eye to the brain, so that the information received by the eye can be processed appropriately. In the December 2022 edition of JAMA Ophthalmology, Dr. Laura Pardon and colleagues…

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Peters Anomaly

What is Peters anomaly? This is a very fair question, as most people have never heard of this corneal disease of the eye. One of the main aspects of Peters anomaly is a central white spot in the very front part of the eye (the cornea). There are also adhesions between the colored part of…

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Corneal Guttata

In the December 2022 edition of the journal Cornea, Silvana Schonit and colleagues published an article showing that corneal guttata are transplanted in about 15% of penetrating keratoplasty grafts. What the heck does that mean? Penetrating keratoplasty grafts are full thickness cornea transplants. In an idealized world, cornea transplants are always perfect pristine tissue samples…

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A Parade of Shoes

Typically, ophthalmologists like to discuss subjects that they feel to be weighty, such as what to do with this disease or what to do about that surgery. This includes considering even the minutiae of very specific techniques and hand positioning. Today, I read a discussion about what the best type of slip-on shoe is. Admittedly,…

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Thyroid in my eye?

There is an association between thyroid disorders and ocular disorders. The “classic” association is between overactive thyroid and eyes bulging out. In the November 2022 issue of the journal JAMA Ophthalmology, Dr. Yuan Pan and colleagues published a study that indicated that oral doxycycline might improve some of the symptoms of this thyroid eye disease,…

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