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Amanda Dexter

Dr. Amanda K. Dexter received her optometric training at Southern California College of Optometry in Fullerton, California, where she was Class of 2010 Valedictorian. She also completed a residency in Primary Care and Ocular Disease at the Veteran's Affairs Hospital in San Diego, California. Dr. Dexter is the Manager and Program Coordinator for OptoPrep, the premiere online study resource for the NBEO Part I & II.

Recent Posts

Everything You Need to Know About NBEO® Part II

Posted by Amanda Dexter on Nov 7, 2019 10:28:35 AM

NBEO® Part II (also known as PAM – Patient Assessment & Management) is typically administered to optometry students in December of their 4th academic year.

For months prior to the examination, you will hear everyone talking about NBEO; what the exam entails, how many questions there are, what types of questions you’ll see, how the test is administered, etc., so we decided to put together a quick cheat-sheet with everything you need to know!

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Topics: NBEO, NBEO Part II

The Truth About Marijuana for the Treatment of Glaucoma

Posted by Amanda Dexter on Oct 28, 2019 12:29:14 PM

Every once in a while, you will get this question… “Can I just smoke marijuana to treat my glaucoma?” Many patients have heard somewhere along the way that marijuana can be an effective treatment for elevated intraocular pressure (IOP) or glaucoma. And a lot of patients aren’t afraid to ask if you can prescribe it for them. So, does it really work?

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Topics: Glaucoma, Glaucoma Medications

Review of Laser Treatments for Glaucoma

Posted by Amanda Dexter on Oct 22, 2019 1:08:33 PM

Laser procedures have become important treatment options in the management of patients with glaucoma. These procedures can be used in place of or in conjunction with topical therapies.
 
There are several different types of laser therapies depending on the type of glaucoma (narrow angle, open angle, pseudoexfoliation, or pigmentary) or the severity of the disease present.
 
Let’s review each of the laser treatments and their indications and mechanisms of action. 
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Topics: Glaucoma, Glaucoma Laser Treatments

Everything You Need to Know About Oral Glaucoma Medications

Posted by Amanda Dexter on Oct 7, 2019 9:09:48 AM
 
 

Systemic medications for intraocular pressure (IOP) control are typically reserved for cases in which a significant temporary drop in IOP is required that cannot be achieved by any other means.
 
Oral preparations are most commonly used in cases of acute angle-closure glaucoma or surrounding intraocular surgery, in which substantial pressure spikes may arise.
 
Because these medications are not as often prescribed as our work-horse topical medications, we’ve put together a quick review of everything you need to know about oral glaucoma drugs in case you are in a situation where these are needed.
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Topics: Glaucoma Medications, Oral Glaucoma Medications

New Kids on the Block: 4 Topical Glaucoma Medications

Posted by Amanda Dexter on Sep 30, 2019 6:29:52 PM

Glaucoma management has become a very hot topic in the past couple of years with the approval of several new topical ophthalmic medications, the advances in glaucoma surgical procedures, and the many new treatments that are still in the pipeline! 

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Topics: Glaucoma, Glaucoma Medications

Isolating a Paretic Muscle Using the Parks 3-Step Test

Posted by Amanda Dexter on Sep 23, 2019 2:10:09 PM

If you are anything like me, when I hear of a patient on their way into the office complaining of sudden onset of double vision, I get a little worried! I was never good at remembering all of the cranial nerve palsies, signs, symptoms, diagnoses, and causes.

But what I do remember is how easy the Parks 3-step test is in helping isolate the paretic muscle in cases of an acquired hypertropia. Here is a quick review that can help you feel more confident in tackling these patients!

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Topics: Parks 3 Step Test, Paretic Muscle

6 Mimickers of a 6th Cranial Nerve Palsy

Posted by Amanda Dexter on Sep 16, 2019 12:20:56 PM

The abducens nerve (6th cranial nerve) controls a single extraocular muscle; the lateral rectus. The lateral rectus is primarily responsible for abducting the eye. A palsy of the abducens nerve is the most common ocular motor paralysis; the affected eye turns inward toward the nose and is unable to abduct properly.

The deviation is constant and is typically greater at distance fixation than at near. The esotropia is also more noticeable when the patient is looking toward the affected side. Diagnosis of a 6th cranial nerve palsy may seem pretty straight forward when piecing together the patient’s history and examination findings; however, you should keep in mind that there are several conditions that may imitate isolated lateral rectus weakness.

We will review these 6 mimickers of a 6th nerve palsy for your review!

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Topics: Cranial Nerve, 6th Cranial Nerve Palsy

Everything You Need to Know About Fourth Cranial Nerve Palsy

Posted by Amanda Dexter on Sep 10, 2019 7:03:16 PM

The fourth cranial nerve (trochlear nerve) controls the actions of a single extraocular muscle; the superior oblique. The trochlear nerve has several unique aspects; it is the smallest nerve in terms of the number of axons it contains, it has the longest course through the skull than any other cranial nerve, it is the only cranial nerve that exits through the dorsal aspect of the brainstem, and it innervates the superior oblique muscle on the contralateral side from its nucleus.

Diseases or injuries of the fourth cranial nerve can lead to paralysis or weakness of the superior oblique muscle which will cause certain signs and symptoms that you will see upon examination.

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Topics: Cranial Nerve

Pupil-Involved vs. Pupil-Sparing Acquired Oculomotor Nerve Palsy

Posted by Amanda Dexter on Sep 4, 2019 1:20:27 PM

Optometrists are often on the front-line when it comes to diagnosis of certain medical conditions, as many disorders can present with ocular signs and symptoms as the initial indicators of disease. With that being said, there are a few conditions that you don’t want to miss as the first physician to see the patient; an acquired third nerve palsy is one of them.

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Topics: Pupil-Involved, Pupil-Sparing, Oculomotor Nerve Palsy

Did You Know Optometry Student: Myotonic Dystrophy

Posted by Amanda Dexter on Aug 26, 2019 9:00:00 AM

Optometry Student, Did you know that approximately 90% of patients with myotonic dystrophy will develop cataracts in the third decade of life?

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Topics: Facts

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