Tags

Type your tag names separated by a space and hit enter

[Mechanism of accommodation of human eye--some new aspects].
Klin Monbl Augenheilkd. 2007 Aug; 224(8):653-8.KM

Abstract

BACKGROUND

The basics of the model of accommodation were described by Hermann von Helmholtz 150 years ago and are accepted until today.

MATERIALS AND METHODS

Twenty-five healthy young phakic test persons (age range 14 to 28 years) were examined using the IOL Master (Carl Zeiss Jena GmbH), slit lamp photography (Scheimpflug camera EAS 1000, Nidek) and pupillography (AMTech GmbH). Measurements were taken of disaccommodated and accommodated eyes.

RESULTS

The mesopic and photopic pupil size are statistically significant (p < 0.05) smaller in accommodated eyes than in disaccommodated. Also, a significantly shorter reaction time of the light-induced pupil reaction with accommodation could be shown compared to disaccommodation. The central vertical and horizontal radii of curvature of the cornea increased with accommodation. This is likewise a decrease of the central anterior corneal curvature by near fixation. Due to the axial lens thickening, the anterior chamber angle and the anterior chamber depth decreased. Consequently, a decrease of the lens transparence resulted with accommodation.

CONCLUSIONS

As a result of our measurements the existing model of accommodation, developed by Hermann von Helmholtz 150 years ago, can be modified.

Authors+Show Affiliations

Augenklinik des Universitätsklinikums, Jena. melanie.mueller@med.uni-jena.deNo affiliation info available

Pub Type(s)

English Abstract
Journal Article

Language

ger

PubMed ID

17717782

Citation

Müller, M, and J Strobel. "[Mechanism of Accommodation of Human Eye--some New Aspects]." Klinische Monatsblatter Fur Augenheilkunde, vol. 224, no. 8, 2007, pp. 653-8.
Müller M, Strobel J. [Mechanism of accommodation of human eye--some new aspects]. Klin Monbl Augenheilkd. 2007;224(8):653-8.
Müller, M., & Strobel, J. (2007). [Mechanism of accommodation of human eye--some new aspects]. Klinische Monatsblatter Fur Augenheilkunde, 224(8), 653-8.
Müller M, Strobel J. [Mechanism of Accommodation of Human Eye--some New Aspects]. Klin Monbl Augenheilkd. 2007;224(8):653-8. PubMed PMID: 17717782.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - [Mechanism of accommodation of human eye--some new aspects]. AU - Müller,M, AU - Strobel,J, PY - 2007/8/25/pubmed PY - 2007/11/14/medline PY - 2007/8/25/entrez SP - 653 EP - 8 JF - Klinische Monatsblatter fur Augenheilkunde JO - Klin Monbl Augenheilkd VL - 224 IS - 8 N2 - BACKGROUND: The basics of the model of accommodation were described by Hermann von Helmholtz 150 years ago and are accepted until today. MATERIALS AND METHODS: Twenty-five healthy young phakic test persons (age range 14 to 28 years) were examined using the IOL Master (Carl Zeiss Jena GmbH), slit lamp photography (Scheimpflug camera EAS 1000, Nidek) and pupillography (AMTech GmbH). Measurements were taken of disaccommodated and accommodated eyes. RESULTS: The mesopic and photopic pupil size are statistically significant (p < 0.05) smaller in accommodated eyes than in disaccommodated. Also, a significantly shorter reaction time of the light-induced pupil reaction with accommodation could be shown compared to disaccommodation. The central vertical and horizontal radii of curvature of the cornea increased with accommodation. This is likewise a decrease of the central anterior corneal curvature by near fixation. Due to the axial lens thickening, the anterior chamber angle and the anterior chamber depth decreased. Consequently, a decrease of the lens transparence resulted with accommodation. CONCLUSIONS: As a result of our measurements the existing model of accommodation, developed by Hermann von Helmholtz 150 years ago, can be modified. SN - 0023-2165 UR - https://www.unboundmedicine.com/medline/citation/17717782/[Mechanism_of_accommodation_of_human_eye__some_new_aspects]_ L2 - http://www.thieme-connect.com/DOI/DOI?10.1055/s-2007-963424 DB - PRIME DP - Unbound Medicine ER -
Try the Free App:
Prime PubMed app for iOS iPhone iPad
Prime PubMed app for Android
Prime PubMed is provided
free to individuals by:
Unbound Medicine.