Experimentelle Untersuchungen �ber die antagonistische Innervation der Ciliarmuskulatur

Meesmann, A

doi:10.1007/bf00680859

Cited by 33 publications

(3 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The pharmacological agents most commonly used in the early studies investigating the question of dual innervation were cocaine (Graves, 1926; Poos, 1928), epinephrine k e . adrenaline (Poos, 1928;Cogan, 1937;Meesmann, 1952;Siebeck, 1953;Biggs et al, 1959;Van Alphen, 1961)l and neosynephrine Le. phenylephrine (Heath, 1936 ; Biggs et al, 1959)l.…”

Section: Studies Using Drugs With Alpha and Beta Effectsmentioning

confidence: 99%

A Review of the Role of Sympathetic Innervation of the Ciliary Muscle in Ocular Accommodation

Gilmartin

1986

Ophthalmic Physiologic Optic

118

View full text Add to dashboard Cite

Although it is well established that autonomic control of ocular accommodation is predominantly parasympathetic, many investigators have, over the last 150 years, proposed that a supplementary sympathetic innervation should be considered. Particular attention is directed in this review to previous literature providing anatomical, physiological and pharmacological evidence for dual innervation of the ciliary muscle. Clinical and psychological evidence is shown to be equivocal. A review of recent laser optometry studies of tonic ("dark-focus") resting positions of accommodation indicates that the inhibitory nature of sympathetic innervation suggested by the majority of previous studies can be further defined with respect to specific adrenergic receptors. The implications of dual innervation relating to ocular accommodation during sustained near-vision tasks is discussed.

show abstract

Section: Studies Using Drugs With Alpha and Beta Effectsmentioning

confidence: 99%

A Review of the Role of Sympathetic Innervation of the Ciliary Muscle in Ocular Accommodation

Gilmartin

1986

Ophthalmic Physiologic Optic

118

View full text Add to dashboard Cite

show abstract

“…2 The iris and ciliary muscles, which are directly responsible for the manifest structural changes in pupillary response and accommodation respectively, receive autonomic innervations from both the mesencephalic Edinger-Westphal nucleus and hypothalamic center in the diencephalon. [3][4][5] Parasympathetic innervation of the iris sphincter muscle results in reduction of pupillary diameter, whereas sympathetic innervation of the iris dilator muscle increases pupil diameter. However, the accommodative state is largely controlled by parasympathetic innervation of the ciliary muscle, although sympathetic innervation plays a complementary role in relaxing accommodation.…”

Section: Introductionmentioning

confidence: 99%

Caffeine intake is associated with pupil dilation and enhanced accommodation

Abokyi

Owusu-Mensah

Osei

2016

Eye

View full text Add to dashboard Cite

PurposeIt is purported that caffeine, an autonomic stimulant, affects visual performance. This study sought to assess whether caffeine intake was associated with changes in pupil size and/or amplitude of accommodation.Patients and methodsA double-masked, crossover study was conducted in 50 healthy subjects of age range 19 to 25 years. Subjects were randomized to treatments such that subjects consumed either 250 mg caffeine drink or vehicle on separate days. Amplitude of accommodation was measured by the push-up technique, and pupil size using a millimeter ruler fixed to a slit lamp biomicroscope in dim illumination (5 lux). Amplitude of accommodation and pupil size were taken at baseline, and at 30, 60 and 90 min time points post treatment. Repeated measures one-way ANOVA and paired t-test were used in analyzing data.ResultsAmplitude of accommodation and pupil size after caffeine intake were significantly greater than vehicle (P<0.001) at each time point. Consumption of the caffeine beverage was associated with significant increases in amplitude of accommodation and pupil size with time (P<0.001). Amplitude of accommodation rose from 12.4 (±2.2 D) at baseline to 15.8(±2.6 D) at 90 min. Similarly, pupil size increased from 3.4 (±0.4 mm) at baseline to 4.5 (±0.72 mm) at 90 min. Consumption of vehicle was not associated with increase in amplitude of accommodation or pupil size with time.ConclusionPupil size and accommodation are affected after ingestion of caffeine. This study suggests caffeine may have some influence on visual functions.

show abstract

“…W~ihrend H e l m h o l t z (31) noch der Auffassung war, dab nur die parasympathische Innervation des Ciliarmuskels bei der Akkommodation eine Rolle spielte, wird neuerdings die Meinung vertreten, dab der Ciliarmuskel ebenso wie die Pupille durch eine antagonistische sympathische-parasympathische Innervation gesteuert wird ( C o g a n (7), H e n d e r s o n (32), M e e s m a n n (57), Mo nje (60), P o o s (77), S i e b e c k (87)). Es soll eine aktive sympathische Innervation fiir die Fernakkommodation sowie eine aktive parasympathische Innervation fiir die Nahakkommodation geben, wobei fiber den Mechanismus dieser Fern-und Nahakkommodation noch Unklarheit herrscht ( M a t t e u c c i (56), M e e s m a n n (57), M o l l i e r (59), K o k e (43)).…”

unclassified

Beitr�ge zum intrakapsul�ren Akkomodationsmechanismus

Kleifeld¹

1956

Doc Ophthalmol

View full text Add to dashboard Cite

Experimentelle Untersuchungen �ber die antagonistische Innervation der Ciliarmuskulatur

Cited by 33 publications

References 7 publications

A Review of the Role of Sympathetic Innervation of the Ciliary Muscle in Ocular Accommodation

A Review of the Role of Sympathetic Innervation of the Ciliary Muscle in Ocular Accommodation

Caffeine intake is associated with pupil dilation and enhanced accommodation

Beitr�ge zum intrakapsul�ren Akkomodationsmechanismus

Contact Info

Product

Resources

About