24 results
Mydriasis Causes - AAAS Mnemonic
 • Atropine
 • Anticholinergic Toxicity
 • Antidepressants (and Serotonin Syndrome)
 •
Mydriasis Causes ... Sympathomimetics #Mydriasis
Mydriasis and Miosis - Differential Diagnosis Framework

Causes of Mydriasis:
Dilated pupils (mydriasis) more than 7mm
 • Unilateral
Mydriasis and Miosis ... Framework Causes of Mydriasis ... Dilated pupils (mydriasis ... • Unilateral Mydriasis ... • Bilateral Mydriasis
Serotonin Syndrome
 - Rapid onset 
 - Combination of 2+ serotonin agonists 
Mental status changes:
Diaphoresis - Mydriasis
Photophobia and Headache - Differential Diagnosis Framework

Why?
• The coexistence of photophobia and headache suggests the potential
Benign episodic mydriasis ... hemorrhage (SAH): - Mydriasis ... nerve pain - Mydriasis
Clinical Manifestations of Serotonin Syndrome
 • Ophthalmologic: Mydriasis, Ocular clonus (slow horizontal movements)
 • Gastrointestinal: Diarrhea,
Ophthalmologic: Mydriasis
Traumatic Iritis
Clinical 
• Photophobia (hallmark) 
• Decreased visual acuity 
• Painful 
Treatment 
• Steroids 
• Mydriatics
• Steroids • Mydriatics
Synechiolysis - Slit Lamp Ocular Examination

Synechiolysis after pharmacological mydriasis in a patient with anterior uveitis.

Dr. Sebastian
pharmacological mydriasis
Argyll Robertson Pupil
Definition:
 - Irregular and small (1-2mm) pupil
 - Light-near dissociation (accommodation remains intact)
 -
response to: Dark, Mydriatics
Characteristics of Serotonin Syndrome and Other Hyperthermic Syndromes 
Serotonin Syndrome
 - SSRIs, second-generation antidepressants, MAOIs, linezolid,
sounds, diarrhea, mydriasis
Right Oculomotor (CNIII) Palsy on Physical Exam

Demonstrates right eyelid ptosis, paralyzed medial rectus and ipsilateral mydriasis.

Dr.
and ipsilateral mydriasis