PURPOSE We measured tear film parameters, including the morphology and function of meibomian glands, in junior high school students at 15 years of age. METHODS A total of 111 eyes of 111 students (56 males and 55 females) were enrolled in the study. The ocular symptom score (0-14), after-school study time, lipid layer thickness (LLT) of the tear film, partial blink rate, lid margin abnormalit...

The purpose of this study was to investigate the association of aortic arch calcification, a surrogate marker of atherosclerosis, with rotator cuff tendinosis and tears given the hypothesis that decreased tendon vascularity is a contributing factor in the etiology of tendon degeneration. A retrospective review was performed to identify patients ages 50 to 90 years who had a shoulder MRI and a c...

The tear film on the front of the eye is critical to proper eyesight; in many mathematical models of the tear film, the tear film is assumed to be on a flat substrate. We re-examine this assumption by studying the effect of a substrate which is representative of the human cornea. We study the flow of a thin fluid film on a prolate spheroid which is a good approximation to the shape of the human...

OBJECTIVE. The management of patients with signs and symptoms referable to the rotator cuff depends on the presence of cuff injury and the size of the tear. Treatment options include conservative nonsurgical management for patients with an intact or partially tom cuff, arthroscopic decompression of the coracoacromlal space for those not responding to nonsurgical management, and a range of surgi...

Numerous studies have shown the biomechanical properties of the meniscus can be restored with repair. The aim of this study is to evaluate if partial undersurface tears of the medial meniscus encountered at the time of arthroscopy have any biomechanical impact on the contact area and peak pressure of the knee. Methods: Nine unmatched cadaveric knees were harvested. The knees were inspected for ...

BACKGROUND The menisci are integral to normal knee function. The purpose of this study was to measure the contact pressures transmitted to the medial tibial plateau under physiological loads as a function of the percentage of the meniscus involved by the radial tear or repair. Our hypotheses were that (1) there is a threshold size of radial tears above which contact mechanics are adversely affe...

A 23-year-old man fell out of his car and was hit by another passing car. He was unconscious from head injuries but was breathing satisfactorily. Surgical emphysema and bruising were present over his upper chest and neck. He vomited once and the vomit was bloodstained. A chest radiograph showed gross surgical emphysema, shallow bilateral pneumothoraces, and multiple right-sided rib fractures. W...

Arthroscopic partial menisectomy followed by cyst decompression is currently recommended for treatment of a meniscal cyst. However, it is doubtful whether partial menisectomy should be performed on cysts communicating with the joint in cases without a meniscal tear on its surface since meniscal function will be sacrificed. In this report, a meniscal cyst arising from the posterior horn of the m...

We consider model problems for the tear film over multiple blink cycles that utilize a single equation for the tear film; the single non-linear partial differential equation that governs the film thickness arises from lubrication theory. The two models that we consider arise from considering the absence of naturally occurring surfactant and the case when the surfactant is strongly affecting the...