[Simultaneous measurement of the tension, elongation, and refractive power of the bovine lens zonule].
We developed a device to measure simultaneously the tension and elongation of the lens zonules, and the refractive power of the lens in 12 bovine eyes. Each sample, which consisted of the lens-zonuleciliary body was fixed to the device at the position of the ciliary process from four directions, and was stretched radially in a container filled with saline solution. The tension was measured by a force transducer, the elongation by a laser-displacement-meter, and the refractive power by a Campbell type refractometer. The refractive power of the lens in the relaxed condition was 24.6 +/- 3.4 D (n = 12, mean +/- standard deviation). When samples were stretched 1 mm from the relaxed condition, the increased change in tension was 2.8 +/- 1.5 g, and the decreased change in refractive power was 1.8 +/- 1.2 D.
Department of Ophthalmology, Tokyo Medical and Dental University, School of Medicine, Japan.
S
S
Kamikawatoko
T
T
Tokoro
K
K
Sogo
S
S
Imai
A
A
Ishida
H
H
Azuma
D000818:Animals; D001696:Biomechanical Phenomena; D002417:Cattle; D002924:Ciliary Body / Q000502:physiology; D066298:In Vitro Techniques; D007908:Lens, Crystalline / Q000502:physiology*; D012029:Refraction, Ocular