Results 51 to 60 of about 893,539 (205)

Simultaneously measuring ocular aberration and anterior segment biometry during accommodation [PDF]

Journal of Innovative Optical Health Sciences, 2015
In the human eye, accommodation is essential for functional vision. However, the mechanisms regulating accommodation and the ocular parameters affecting aberrations remain to be explored.
Yuanyuan Wang, Yilei Shao, Yimin Yuan
doaj   +1 more source

MRI study of the changes in crystalline lens shape with accommodation and ageing in humans [PDF]

, 2011
Magnetic Resonance Imaging was used to study changes in the crystalline lens and ciliary body with accommodation and aging. Monocular images were obtained in 15 young (19-29 years) and 15 older (60-70 years) emmetropes when viewing at far (6m) and at ...
S. Kasthurirangan, Kasthurirangan, Sanjeev, Pope, James M., J. M. Pope, E. L. Markwell, Atchison, David A., Markwell, Emma L., D. A. Atchison   +7 more
core   +1 more source

Influence of zonular tension on molecular transport in the porcine ocular lens

Frontiers in Ophthalmology
IntroductionAccommodation is the process of changing the ocular lens’ refractive power and focal distance. This process involves application of biomechanical forces on the lens by the surrounding musculature.
Morgan Crews, Wade Rich, Matthew A. Reilly, Matthew A. Reilly   +3 more
doaj   +1 more source

Transient crystalline lens deposits following the insertion of a phakic sulcus-fixated collamer intraocular lens in a hyperopic eye

American Journal of Ophthalmology Case Reports, 2020
Purpose: The purpose of this study was to report crystalline lens deposit formation following ICL implantation for the correction of hyperopia. Observations: A 23-year-old male presented at the American University of Beirut Medical Center in 2008 seeking
Lama El Khatib, Ahmad K. Hatoum, Hassan M. Moukhadder, Nasrine Anais El Salloukh, Shady T. Awwad   +4 more
doaj   +1 more source

Clinical and epidemiological characterization of patients of the municipality of Puerto Padre, who underwent cataract surgery

Revista Electrónica Dr. Zoilo E. Marinello Vidaurreta, 2017
Background: cataract is the most frequent cause of preventable blindness in the municipality of Puerto Padre and in the country. Its treatment is surgical.Objective: to characterize the clinical and epidemiological variables in patients operated on for ...
Juan Carlos Góngora Torres, Yaumary Bauza Fortunato, Maelis Hernández Soria, Yamaris Rosabal Crespo, Laritza López Pelaez   +4 more
doaj  

Misdiagnosis or missed diagnosis: Occult lens subluxation in eyes presenting with acute angle closure glaucoma

Indian Journal of Ophthalmology. Case Reports
Anterior subluxation of the crystalline lens can precipitate acute secondary angle closure with a rapid rise in intraocular pressure mimicking an attack of acute primary angle closure glaucoma.
Swati Singh, Bharat R Thoumungkan, H S Harish, Avnindra Gupta   +3 more
doaj   +1 more source

The Relationship between Crystalline Lens Power and Refractive Error in Older Chinese Adults: The Shanghai Eye Study.

PLoS ONE, 2017
PurposeTo report calculated crystalline lens power and describe the distribution of ocular biometry and its association with refractive error in older Chinese adults.MethodsRandom clustering sampling was used to identify adults aged 50 years and above in
Jiangnan He, Lina Lu, Xiangui He, Xian Xu, Xuan Du, Bo Zhang, Huijuan Zhao, Jida Sha, Jianfeng Zhu, Haidong Zou, Xun Xu   +10 more
doaj   +1 more source

Effects of lighting conditions and accommodation on the three-dimensional position of Visian implantable collamer lens

Eye and Vision, 2022
Background To investigate the effects of lighting conditions and accommodation on the three-dimensional position of Visian implantable collamer lens (ICL V4c).
Lingling Niu, Zhe Zhang, Huamao Miao, Jing Zhao, Xiaoying Wang, Ji C. He, Xingtao Zhou   +6 more
doaj   +1 more source

Prescripción de lente de contacto en niños de Las Tunas

Revista Electrónica Dr. Zoilo E. Marinello Vidaurreta, 2016
Fundamento:el empleo de lentes de contacto se ha incrementado a nivel mundial; en la actualidad su uso no se restringe solamente a la corrección óptica, sino que se utilizan con fines terapéuticos, ya que generan comodidad y estética en múltiples ...
Yusimy Agüero Viamontes, Mario Enrique Pla Acevedo, Isis Infante Vinent   +2 more
doaj  

Mathematical models for describing the shape of the in vitro unstretched human crystalline lens [PDF]

, 2009
We developed orthogonal least-squares techniques for fitting crystalline lens shapes, and used the bootstrap method to determine uncertainties associated with the estimated vertex radii of curvature and asphericities of five different models.
Smith, George, Pope, James M., Atchison, David A., Iskander, Robert, Jones, Catherine E.   +4 more
core   +1 more source