By:Liu, XY (Liu, Xiaoyu)^[ 1 ] ; Wang, LZ (Wang, Lizhen)^[ 1 ] ; Du, CF (Du, Chengfei)^[ 1 ] ; Li, DY (Li, Deyu)^[ 1 ] ; Fan, YB (Fan, Yubo)^[ 1,2 ]

Blunt impact on the eye could results in lens capsular rupture that allows foreign substances to enter into the lens and leads to cataract formation. This paper aimed to investigate the mechanism of lens capsular rupture using finite element (FE) method. A FE model of the human eye was developed to simulate dynamic response of the lens capsule to a BB (a standard 4.5-mm-diameter pellet) impact. Sensitivity studies were conducted to evaluate the effect of the parameters on capsular rupture, including the impact velocity, the elastic modulus of the lens, the thickness and the elastic modulus of the lens capsule. The results indicated that the lens was subjected to anterior compression and posterior intension when the eye was stricken by a BB pellet. The strain on the posterior capsule (0.392) was almost twice as much as that on the anterior capsule (0.207) at an impact velocity of 20m/s. The strain on the capsule was proportional to the impact velocity, while the capsular strain showed no significant change when the lens modulus elastic varied with age. The findings confirmed that blunt traumatic capsular rupture is the result of shockwave propagation throughout the eye. The posterior capsule is subjected to greater tension in blunt trauma, which is the main cause that ruptures are more commonly found on the posterior capsule than the anterior capsule. Also, thinner thickness and lower elastic modulus would contribute to the posterior capsular rupture.

Author Keywords:lens capsular rupture; blunt ocular trauma; finite element analysis

KeyWords Plus:OCULAR INJURY; EYE; IMPACT; MODEL; SIMULATION; AGE

Reprint Address: Fan, YB (reprint author)

Beihang Univ, Sch Biol Sci & Med Engn, State Key Lab Virtual Real Technol & Syst, Key Lab Biomech & Mechanobiol,Minist Educ, Beijing 100191, Peoples R China.

Addresses:

	[ 1 ] Beihang Univ, Sch Biol Sci & Med Engn, State Key Lab Virtual Real Technol & Syst, Key Lab Biomech & Mechanobiol,Minist Educ, Beijing100191, Peoples R China
	[ 2 ] Beihang Univ, Minist Sci & Technol China, Int Joint Res Ctr Aerosp Biotechnol & Med Engn, Beijing 100191, Peoples R China

E-mail Addresses:yubofan@buaa.edu.cn

TAYLOR & FRANCIS LTD, 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND

Research Areas:Computer Science; Engineering

Web of Science Categories:Computer Science, Interdisciplinary Applications; Engineering, Biomedical

Document Type:Article

Language:English

Accession Number: WOS:000345372200010

PubMed ID: 25427212

ISSN: 1025-5842

eISSN: 1476-8259

• Impact Factor: Journal Citation Reports®

IDS Number: AU1HQ

Cited References in Web of Science Core Collection: 34

Times Cited in Web of Science Core Collection: 0