literature recommends a slope of between 0 and 15 degrees.
Of the estimated 20 million American women using VDTs
on the job, about the five million of childbearing age are believed to be using the machines daily.
In a study by Miyake-Kashima and co-authors (2005), seven participants viewed a VDT
for 10 minutes with and without an antireflection film.
Table 4: Causes of eyestrain in the age group: 13 to 15 years Age Group 13 to 15 Convergence Insufficiency 13 Phorias 4 Tropias 1 VDTS
2 OSD 2 Normal 11 Miscellaneous 1 Total 34 As seen in the bar diagram, convergence insufficiency seems is the major cause eyestrain in 13 to 15 years of age
Angle from Vertical VDT
Normal 55[degree] 300cd -- 65[degree] 220cd 300cd 75[degree] 135cd 185cd 85[degree] 45cd 60cd The recommendations in RP-1 are based on a study by Miller and others , which also found that the VDT
is the most critical factor in screen visibility.
In susceptible reactions, cuttings displayed Verticillium wilt-like symptoms after uptake of the VdTs
Results are inconsistent in the association between VDT
use and the risk of small-for-gestational-age (SGA) birth (Braken et al., 1995; Ericson & Kallen, 1986a; Ericson & Kallen 1986b; McDonald et al., 1988; Nielsen & Brandt, 1992; Nurminen & Kurppa, 1988).
Measurements of MDT were recorded at each test site first, followed by measurements of VDT
and thermal thresholds (cool detection threshold [CDT], warm detection threshold [WDT], CPT, and hot pain threshold [HPT]).
According to Mogensen, government officials concluded that regulations related to VDT
safety and health might result in a loss of economic investment, jobs, and tax revenues.
Saito, Taptagaporn, and Salvendy (1995) and Iwasaki and Kurimoto (1987) measured the degree of eyestrain caused by visual work by measuring the temporary change in accommodation power following VDT
Scientists have conducted extensive research on the health effects of Video Display Terminals (VDTs
The reasons for eyestrain among computer users include primary and secondary glare, excessive lighting, improper ergonomics, poor-quality or inappropriately adjusted video display terminals (VDTs
), uncorrected or improperly corrected vision, and insufficient or non-existent eye care.