Document Detail

The clinical efficacy of paremyd with and without dapiprazole in subjects with light and dark brown irides.
MedLine Citation:
PMID:  10082055     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Paremyd, a mydriatic formulation of 0.25% tropicamide and 1.0% hydroxyamphetamine hydrobromide provides adequate dilation for binocular indirect ophthalmoscopy in young Caucasians. We studied the clinical effectiveness of Paremyd in dilating heavily pigmented eyes by comparing its mydriatic efficacy in Blacks, Asians and Caucasians with light and dark brown irides. We also evaluated the efficacy of one drop of dapiprazole (Rev-Eyes) in reversing Paremyd-induced mydriasis in our subject sample. METHODS: In a masked, randomized, controlled experimental design, several visual functions which included pupillary dilation, near visual acuity, amplitude of accommodation, ocular hyperemia, and discomfort glare were measured at 30-min intervals, for a total of 300 min, in subjects dilated with a single drop of Paremyd in each eye. Ease of binocular indirect ophthalmoscopy was also assessed. A 3-way analysis of variance was used to assess changes in these measures as function of irides color/pigmentation (designated as light or dark brown iris color), presence or absence of dapiprazole, and test time interval. RESULTS: We found that subjects in our light brown irides group (mainly Caucasians) dilated faster than subjects in our dark brown irides group (mainly Blacks). Dapiprazole increased the speed of recovery from pupillary dilation for all subjects, but more so for those with light rather than dark brown irides. Similarly, subjects with light rather than dark brown irides recovered accommodative function more quickly. Although neither the use of dapiprazole nor the degree of iris color/pigmentation was significantly related to visual acuity or glare discomfort, there was a clear trend that these visual measures were affected to a greater degree in subjects with dark brown (primarily Blacks) rather than light brown irides. Overall, Paremyd provided adequate dilation for binocular indirect ophthalmoscopy in all subjects irrespective of iris color/pigmentation. CONCLUSIONS: Our data indicate that a single drop of Paremyd provides adequate mydriasis, without significant side effects, for routine fundus examination of all subjects, independent of iris color/pigmentation. Furthermore, a single drop of dapiprazole was effective in speeding the return of pupillary dilation in most subjects, but had no significant effect on accommodation, near visual acuity or glare discomfort. Side effects such as stinging upon instillation, conjunctival hyperemia, and a few instances of ptosis, with possible additional cost to patients, appear to lessen its overall clinical benefit.
U M Anicho; J Cooper; J Feldman; S D Jaanus; K Dignam
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Publication Detail:
Type:  Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Optometry and vision science : official publication of the American Academy of Optometry     Volume:  76     ISSN:  1040-5488     ISO Abbreviation:  Optom Vis Sci     Publication Date:  1999 Feb 
Date Detail:
Created Date:  1999-05-04     Completed Date:  1999-05-04     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8904931     Medline TA:  Optom Vis Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  94-101     Citation Subset:  IM    
Schnurmacher Institute for Vision Research, State University of New York, State College of Optometry, New York 10010-3677, USA.
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MeSH Terms
Accommodation, Ocular / drug effects
Adrenergic alpha-Antagonists / administration & dosage,  therapeutic use*
Drug Therapy, Combination
Eye Color*
Iris / drug effects,  physiology
Mydriatics / administration & dosage,  therapeutic use*
Ophthalmic Solutions / administration & dosage,  therapeutic use
Pupil / drug effects*
Triazoles / administration & dosage,  therapeutic use*
Tropicamide / administration & dosage,  therapeutic use*
Visual Acuity / drug effects
p-Hydroxyamphetamine / administration & dosage,  therapeutic use*
Reg. No./Substance:
0/Adrenergic alpha-Antagonists; 0/Mydriatics; 0/Ophthalmic Solutions; 0/Piperazines; 0/Triazoles; 103-86-6/p-Hydroxyamphetamine; 1508-75-4/Tropicamide; 72822-12-9/dapiprazole

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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