Weekly Glance for July 9th

What's new in optometry, week by week.


Worse vision = worse cognitive impairment.

So says a new study published in JAMA Ophthalmology.
In the study, over 2,500 patients with an average age at baseline of 73.5 years were followed over the course of 8 years. Along with their vision, the patients cognition was checked using the Mini-Mental State Exam at baseline, year 2, 6, and 8. 

What did they find?
1. Patients that had worse vision at baseline also scored worse on the cognitive tests.
2. Vision and cognitive functioning are associated longitudinally (meaning they are changing together).
3. Vision has a substantially larger influence on subsequent change in cognitive score than the other way around.

How are vision and cognitive impairment related?
One theory is that worsening vision can discourage people from brain-stimulating activities like doing crosswords. Another theory is that "VA and cognitive function decline are both the result of a common cause, such as inflammation or degeneration of central nervous function". (via)


Third time's a charm.

Ocular Therapeutix resubmits Dextenza to the FDA (for the third time).

What is Dextenza?
It's a dexamethasone insert, placed through the punctum into the canaliculus and is designed to deliver dexamethasone to the ocular surface for up to 30 days. Following treatment, Dextenza resorbs and exits the nasolacrimal system without the need for removal. The trial investigated Dextenza for the treatment of post-surgical ocular inflammation and pain. 

Why was it rejected previously?
Both the first and second submissions to the FDA were rejected because of concerns relating to the manufacturing process. 

When will we hear if this is approved?
They company is hoping by the end of this year. (via)



Can my child get glasses to prevent myopia?

If you live in Asia, maybe later this year.
A research team has collaborated with Hoya on a new spectacle lens called the Defocus Incorporated Multiple Segments (DIMS) lens.

What is the DIMS lens?
The lens has a central optical zone for correcting refractive error but the key is the multiple little micro-lenses that create constant myopic defocus surrounding the central zone extending to the mid-periphery of the lens. Here is a picture. 

Why do we want peripheral myopic defocus?
Because studies have shown to control myopia progression, we need to induce myopic defocus in the periphery. Here is a great presentation on this concept.

Tell me about the clinical study.
The trial involved 160 Chinese children (ages 8-13), 79 of which were assigned the DIMS lens. They two year study showed the DIMS lenses slowed myopia progression in 60% of kids and stopped progression in 21.5% of kids. The mean myopic progression of the DIMS group over two years was 0.38D whereas the single vision glasses group was 0.93D. (trial info via)

When can I get this lens?
If you're in the US, not until next year. But they are hoping to launch the lens later this year in Hong Kong and China. (via)

This news comes alongside a report published in JAMA Ophthalmology stating that myopia among Chinese students has reached "epidemic levels". However, it should be noted the children in the report did not have cycloplegic refractions. (via)



Careful how hard you blow your nose.

This patient gave herself an orbital fracture after blowing her nose.

Suns out, glasses on.

If you can't find cute sunglasses for your little one, problem solved. Use the code "Glance" and get 20% off your order.

Fox news anchor has EBMD.

The story details her painful experience with RCE's and how it took two specialists to diagnose it.
Done! Have a great Monday!
See you next week!
Jackie Garlich
Editor & Founder // 20/20 Glance

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