Digital eye strain: prevalence, measurement and amelioration

Eye Strain and Convergence

Eye Strain

He says : With the parts thus rendered specially receptive to infective germs there is little difficulty in understanding that inflammations should ensue, and thus we find that blepharitis, corneal ulcers, phlyctsenulse, iritis, cyclitis, and glaucoma may have eye strain as one of the predisposing causes. There is also little doubt that cataract may be started by the irregular contraction of th...

Accuracy of an Intraoral Digital System for File Length Measurement

Introdouction: Canal length measurement is essential for proper endodontic treatment. Any error or miscalculation in working length determination, particularly in curved canals, can result in complications during or after root canal therapy. Digital radiography has enabled accurate measurement of curved canal length. In this study, we evaluated the accuracy of calibration of a complementary m...

Use of three-dimensional ultrasonography of the eye and measurement of optical long axis in dog

This study was conducted to determine the use of three-dimensional ultrasonography (3DU) in ocular imaging of the dog and measuring of its optical axis. 12 healthy mixed-breed dogs including 6 males and 6 females were studied. 3DU of the eyes were done using a 5–12 MHz linear trapezoid transducer. 3DU of the eyes were evaluated and the normal optical long axis through a line between the cornea ...

Processing Digital Image for Measurement of Crack Dimensions in Concrete

The elements of the concrete structure are most frequently affected by cracking. Crack detection is essential to ensure safety and performance during its service life. Cracks do not have a regular shape, in order to achieve the exact dimensions of the crack; the general mathematical formulae are by no means applicable. The authors have proposed a new method which aims to measure the crack dimen...