b Reduced magnification, increased field, compared to an
emmetrope(1-3) There was slightly thinner cornea in high myopes and in myopic astigmatism.[R] Review of literature also indicates that decrease in corneal thickness in myopic patients is due to anterior segment change, as eyeball is elongated and
emmetropes too had thinner Central Corneal Thickness.
Out of the total 126 subjects, there were 51 myopic patients 37
emmetropes, and 38 hypermetropes.
Our finding of increased dry eye prevalence in uncorrected refractive errors as compared to
emmetropes is consistent with observation by Moss et al., [6] Albietz, [5] Sahai and Mallik, [7] who found a higher prevalence of dry eye in hypermetropes (22.9%) and myopes (16.8%) compared to
emmetropes (14%).
When adjusted for age, myopes had a deeper ACD than both
emmetropes and hyperopes who had similar ACD.
Objectives: To estimate the frequency of myopia among MBBS students of AIMC; to point out the under lying factors of myopia; and to compare these factors among myopics and
emmetropes in a Cross Sectional Comparative, study form March 2010 to September 2010.
All participants were functional
emmetropes with an acuity with normal correction of 6/6 or better.
Exceptions to this are in some
emmetropes / low myopes who are particularly fussy/ attentive to detail and /or have jobs with high functioning visual requirements such as pilots and surgeons.
Collins, "Axial length and choroidal thickness changes accompanying prolonged accommodation in myopes and
emmetropes," Vision Research, vol.
The various refractive statuses of sample population were determined and majority (828/903) were found to be
emmetropes with mean AL of 22.48 mm.
Group Number of subjects Age mean [+ or -] SD (years)
Emmetropes 41 24.27 [+ or -] 2.49 Myopes 41 23.93 [+ or -] 2.13 Group SER mean [+ or -] SD (diopter)
Emmetropes -0.10 [+ or -] 0.50 Myopes -4.70 [+ or -] 1.64 Table 3: Comparison of Dy between emmetropic and myopic groups.
A second factor may be proposed for the greater disruption of visual performance by blur for
emmetropes than for myopes: There is a difference in the response of their ocular accommodation to blur.