Measurement of Force Required for Anterior Displacement of Intraocular Lenses and Its Defining Parameters

Autor: Masaki Tanito, Yoshihisa Ishiba, Sachiko Kaidzu, Yuji Matsuda, Mihoko Mochiji
Rok vydání: 2020
Předmět:
medicine.medical_specialty
Materials science
intraocular lens (IOL)
0206 medical engineering
Glaucoma
After cataract
02 engineering and technology
lcsh:Technology
Junction area
Article
Vitreous cavity
03 medical and health sciences
one-piece IOL
0302 clinical medicine
soft-acrylic IOL
Ophthalmology
medicine
IOL hardness
General Materials Science
Displacement (orthopedic surgery)
Anterior displacement
lcsh:Microscopy
Vitreous surgery
lcsh:QC120-168.85
haptics junction area
lcsh:QH201-278.5
lcsh:T
medicine.disease
020601 biomedical engineering
posterior IOL bulge
Intraocular lenses
lcsh:TA1-2040
030221 ophthalmology & optometry
lcsh:Descriptive and experimental mechanics
lcsh:Electrical engineering. Electronics. Nuclear engineering
lcsh:Engineering (General). Civil engineering (General)
lcsh:TK1-9971
IOL displacement force
Zdroj: Materials
Materials, Vol 13, Iss 4593, p 4593 (2020)
Volume 13
Issue 20
ISSN: 1996-1944
DOI: 10.3390/ma13204593
Popis: Intraocular stability during or after cataract and glaucoma filtration surgeries and vitreous surgery with a gas/silicone oil tamponade might differ among intraocular lenses (IOLs). We used six different one-piece IOL models and measured the force that displaced the IOLs from the vitreous cavity to anterior chamber as a measure of stability against the pressure gradient between the anterior and posterior IOL surfaces. We measured IOL hardness, haptics junction area, and posterior IOL bulge to identify what determines the IOL displacement force. The KOWA YP2.2 IOL (1.231 mN) required significantly greater force than the HOYA XY1 (0.416 mN, p = 0.0004), HOYA 255 (0.409 mN, p = 0.0003), Alcon SN60WF (0.507 mN, p = 0.0010), and Nidek NS60YG (0.778 mN, p = 0.0186) IOLs
J&
J ZCB00V IOL (1.029 mN) required greater force than the HOYA XY1 (p = 0.0032) and HOYA 255 (p = 0.0029) IOLs
the Nidek NS60YG IOL required greater force than the HOYA 255 (p = 0.0468) IOL. The haptics junction area was correlated positively with the IOL displacement force (r = 0.8536, p = 0.0306)
the correlations of the other parameters were non-significant. After adjusting for any confounding effects, the haptics junction area was correlated significantly with the IOL displacement force (p = 0.0394)
the IOL hardness (p = 0.0573) and posterior IOL bulge (p = 0.0938) were not. The forces that displace IOLs anteriorly differed among one-piece soft-acrylic IOLs, and the optics/haptics junction area was the major force determinant.
Databáze: OpenAIRE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje