[Cycloplegic effectiveness of cyclopentolate and tropicamide preparations compared with atropinization]

Related Experiment Video

Updated: Sep 27, 2026

Trabeculotome Tunneling Trabeculoplasty (3T): A Step-by-Step Surgical Protocol for Primary Open-angle Glaucoma
05:13

Trabeculotome Tunneling Trabeculoplasty (3T): A Step-by-Step Surgical Protocol for Primary Open-angle Glaucoma

Published on: May 29, 2026

O V Proskurina

    Vestnik Oftalmologii
    |January 1, 2003
    PubMed

    Insights

    Cyclopentolate effectively matches atropine for cycloplegic refraction in children. Tropicamide is less potent, suitable for specific myopia cases or when other agents are not tolerated.

    Area of Science:

    • Ophthalmology
    • Pediatric Optometry

    Background:

    • Accurate refractive error assessment in children is crucial for timely intervention.
    • Cycloplegic agents are essential for relaxing accommodation during refraction.
    • Comparing efficacy of mild cycloplegic agents against conventional atropine is important for clinical practice.

    Purpose of the Study:

    • To compare the cycloplegic efficacy of cyclopentolate and tropicamide against atropine in pediatric patients.
    • To evaluate the suitability of these agents for initial and repeat refractive examinations.

    Main Methods:

    • A comparative study involving 114 children undergoing cycloplegic refraction.
    • Instillation of cyclopentolate and atropine in one group (57 children).
    • Instillation of tropicamide and atropine in another group (57 children).

    Main Results:

    • Cyclopentolate demonstrated a cycloplegic effect comparable in depth to atropine.
    • Tropicamide exhibited a less potent cycloplegic effect than cyclopentolate.
    • Cyclopentolate is suitable for initial and repeat refractions across all refractive errors.
    • Tropicamide is recommended for initial myopia refractions and repeat refractions in myopia/hypermetropia, or for patients intolerant to other agents.

    Conclusions:

    • Cyclopentolate is a viable alternative to atropine for comprehensive cycloplegic refraction in children.
    • Tropicamide offers a milder option for specific pediatric refractive assessment scenarios.

    Related Concept Videos

    Cholinergic Antagonists: Pharmacokinetics01:24

    Cholinergic Antagonists: Pharmacokinetics

    Cholinergic antagonists—such as antimuscarinics—are available in oral, topical, ocular, parenteral, and inhalational formulations. Most antimuscarinics are oral formulations,  while scopolamine is available as a topical patch, and ipratropium and tiotropium are available as inhalation aerosols or powders. Atropine, tropicamide, and cyclopentolate are topically instilled in the eye. Most antimuscarinics are lipid-soluble and readily absorbed from the gastrointestinal tract and the conjunctiva.
    Ophthalmic Drug Delivery Systems01:23

    Ophthalmic Drug Delivery Systems

    Ophthalmic drug delivery faces major limitations due to poor absorption across the corneal membrane. This process is primarily driven by diffusion and is influenced by two main factors: the physicochemical properties of the drug and tear drainage. Most ophthalmic drugs, such as pilocarpine, epinephrine, atropine, and local anesthetics, are weak bases. They are typically formulated at an acidic pH to enhance chemical stability. However, this leads to high ionization, reducing their ability to...
    Cholinergic Antagonists: Chemistry and Structure-Activity Relationship01:29

    Cholinergic Antagonists: Chemistry and Structure-Activity Relationship

    Cholinergic antagonists bind to cholinergic receptors and limit the effects of acetylcholine and other cholinergic agonists. Based on the specific cholinergic receptor affinity, these antagonists are classified as muscarinic or nicotinic. Anticholinergics interrupt parasympathetic innervations while sympathetic innervations remain uninterrupted. Muscarinic antagonists are also called 'muscarinic antagonists', 'antimuscarinics', or 'parasympatholytics'. Nicotinic antagonists are called...
    Direct-Acting Cholinergic Agonists: Pharmacokinetics01:31

    Direct-Acting Cholinergic Agonists: Pharmacokinetics

    Direct-acting cholinergic agonists, such as synthetic choline esters and naturally occurring alkaloids, exert their effects by enhancing the actions of acetylcholine and stimulating the parasympathetic nervous system. Synthetic choline esters share structural similarities with acetylcholine. For example, they have a positively charged quaternary ammonium or onium group, contributing to their hydrophilic characteristics. As a result, they are poorly absorbed in the body through oral...
    Direct-Acting Cholinergic Agonists: Therapeutic Uses01:11

    Direct-Acting Cholinergic Agonists: Therapeutic Uses

    Direct-acting cholinergic agonists have many therapeutic uses in various medical fields. Choline esters, including acetylcholine, have limited clinical utility due to their non-selectivity and short duration of action. Still, acetylcholine and carbachol are applied topically during ophthalmologic surgery to induce miosis. Pilocarpine, a muscarinic and ganglionic stimulator, effectively treats open-angle glaucoma and alleviates xerostomia and dry mouth caused by radiotherapy or Sjögren syndrome.
    Indirect-Acting Cholinergic Agonists: Pharmacokinetics01:22

    Indirect-Acting Cholinergic Agonists: Pharmacokinetics

    Indirect-acting cholinergic agonists, or anticholinesterases, enhance the body's cholinergic activity by inhibiting acetylcholine's breakdown. They are categorized as reversible or irreversible agents based on their mechanism of action. They are further classified into short-acting, intermediate-acting, and long-acting agents based on their duration of action.
    Reversible agents containing quaternary amines, such as neostigmine and edrophonium, are not easily absorbed orally because they are...