Limits...
Relations between age, weight, refractive error and eye shape by computerized tomography in children.

Song HT, Kim YJ, Lee SJ, Moon YS - Korean J Ophthalmol (2007)

Bottom Line: Axial length was found to correlate significantly with eye width (r=0.914), and in emmetropic eyes and myopic eyes, axial lengths and widths were found to increase as age and body weight increased.The axial length was longer in case of myopia compared to emmetropia in all age groups and there was almost no difference in the increase rate of axial length by the age of myopia and emmetropia.However, the width was wider in case of myopia compared to emmetropia in all age groups and the increase rate of width in myopia by age was smaller than that of emmetropia.

View Article: PubMed Central - PubMed

Affiliation: Department of Ophthalmology, Inha University College of Medicine, Inha University Hospital, Incheon, Korea.

ABSTRACT

Purpose: To investigate relationships between age, weight, refractive error, and morphologic changes in children's eyes by computerized tomography (CT).

Methods: Of the 772 eyes of 386 patients under the age of 20 years, who visited our Department of Ophthalmology between January 2005 to August 2006 and underwent CT of the orbit, 406 eyes of 354 patients with clear CT images and normal eyeball contour were enrolled in the present retrospective study. The axial lengths, widths, horizontal and vertical lengths, refractive errors, and body weight of eyes were measured, and relationship between these parameters were investigated.

Results: Axial length was found to correlate significantly with eye width (r=0.914), and in emmetropic eyes and myopic eyes, axial lengths and widths were found to increase as age and body weight increased. Axial lengths increased rapidly until age 10, and then increased slowly. In emmetropic eyes, widths/axial lengths increased with age, but in myopic eyes these decreased as age or severity of myopia increased. Moreover, as age increased, the myopic population and severity also increased.

Conclusions: The axial length was longer in case of myopia compared to emmetropia in all age groups and there was almost no difference in the increase rate of axial length by the age of myopia and emmetropia. However, the width was wider in case of myopia compared to emmetropia in all age groups and the increase rate of width in myopia by age was smaller than that of emmetropia. Myopia showed decreasing rate of width/axial length with increase of age, from 1.004 in 5 years to 0.971 in 20 years. However, emmetropia showed increasing rate of width/axial length with increase of age, from 0.990 in 5 years to 1.006 in 20 years.

Show MeSH

Related in: MedlinePlus

Relationship between spherical equivalent and axial length, spherical equivalent and width/axial length.(A) Relationship between spherical equivalent and axial length in myopia (r=-0.598, p<0.001) and the total population (r=-0.595, p<0.001).(B) Relationship between spherical equivalent and width/axial length in myopia (r=0.575, p<0.001) and in the total population (r=0.495, p<0.001).(C) Relationship between age and spherical equivalent in myopia (r=-0.335, p=0.004).(D) Relationship between age and the proportion of myopic eyes in the total population (r=0.634, p=0.002).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC2629680&req=5

Figure 3: Relationship between spherical equivalent and axial length, spherical equivalent and width/axial length.(A) Relationship between spherical equivalent and axial length in myopia (r=-0.598, p<0.001) and the total population (r=-0.595, p<0.001).(B) Relationship between spherical equivalent and width/axial length in myopia (r=0.575, p<0.001) and in the total population (r=0.495, p<0.001).(C) Relationship between age and spherical equivalent in myopia (r=-0.335, p=0.004).(D) Relationship between age and the proportion of myopic eyes in the total population (r=0.634, p=0.002).

Mentions: Axial length was found to be significantly associated with width, horizontal length and vertical length (correlation coefficient r > 0.8 for all). Axial length showed proportional increase with age and weight and increased rapidly until age of 10 (Fig. 2). Axial length increased but width/axial length decreased as degree of myopia increased, and as age increased the degree and proportion of myopic eyes also increased (Fig. 3). Axial length in myopia was longer than in emmetropia in all age groups and increases in axial length were similar in myopia and emmetropia. Width in myopia was wider than in emmetropia in all age groups, but width in myopia increased less than in emmetropia. In myopia, width/axial length decreased with age, and was 1.004 at age 5 but decreased to 0.971 at age 20. However, in emmetropia, width/axial length increased with age. It was 0.990 at age 5 but increased to 1.006 at age 20 (Fig. 4).


Relations between age, weight, refractive error and eye shape by computerized tomography in children.

Song HT, Kim YJ, Lee SJ, Moon YS - Korean J Ophthalmol (2007)

Relationship between spherical equivalent and axial length, spherical equivalent and width/axial length.(A) Relationship between spherical equivalent and axial length in myopia (r=-0.598, p<0.001) and the total population (r=-0.595, p<0.001).(B) Relationship between spherical equivalent and width/axial length in myopia (r=0.575, p<0.001) and in the total population (r=0.495, p<0.001).(C) Relationship between age and spherical equivalent in myopia (r=-0.335, p=0.004).(D) Relationship between age and the proportion of myopic eyes in the total population (r=0.634, p=0.002).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2629680&req=5

Figure 3: Relationship between spherical equivalent and axial length, spherical equivalent and width/axial length.(A) Relationship between spherical equivalent and axial length in myopia (r=-0.598, p<0.001) and the total population (r=-0.595, p<0.001).(B) Relationship between spherical equivalent and width/axial length in myopia (r=0.575, p<0.001) and in the total population (r=0.495, p<0.001).(C) Relationship between age and spherical equivalent in myopia (r=-0.335, p=0.004).(D) Relationship between age and the proportion of myopic eyes in the total population (r=0.634, p=0.002).
Mentions: Axial length was found to be significantly associated with width, horizontal length and vertical length (correlation coefficient r > 0.8 for all). Axial length showed proportional increase with age and weight and increased rapidly until age of 10 (Fig. 2). Axial length increased but width/axial length decreased as degree of myopia increased, and as age increased the degree and proportion of myopic eyes also increased (Fig. 3). Axial length in myopia was longer than in emmetropia in all age groups and increases in axial length were similar in myopia and emmetropia. Width in myopia was wider than in emmetropia in all age groups, but width in myopia increased less than in emmetropia. In myopia, width/axial length decreased with age, and was 1.004 at age 5 but decreased to 0.971 at age 20. However, in emmetropia, width/axial length increased with age. It was 0.990 at age 5 but increased to 1.006 at age 20 (Fig. 4).

Bottom Line: Axial length was found to correlate significantly with eye width (r=0.914), and in emmetropic eyes and myopic eyes, axial lengths and widths were found to increase as age and body weight increased.The axial length was longer in case of myopia compared to emmetropia in all age groups and there was almost no difference in the increase rate of axial length by the age of myopia and emmetropia.However, the width was wider in case of myopia compared to emmetropia in all age groups and the increase rate of width in myopia by age was smaller than that of emmetropia.

View Article: PubMed Central - PubMed

Affiliation: Department of Ophthalmology, Inha University College of Medicine, Inha University Hospital, Incheon, Korea.

ABSTRACT

Purpose: To investigate relationships between age, weight, refractive error, and morphologic changes in children's eyes by computerized tomography (CT).

Methods: Of the 772 eyes of 386 patients under the age of 20 years, who visited our Department of Ophthalmology between January 2005 to August 2006 and underwent CT of the orbit, 406 eyes of 354 patients with clear CT images and normal eyeball contour were enrolled in the present retrospective study. The axial lengths, widths, horizontal and vertical lengths, refractive errors, and body weight of eyes were measured, and relationship between these parameters were investigated.

Results: Axial length was found to correlate significantly with eye width (r=0.914), and in emmetropic eyes and myopic eyes, axial lengths and widths were found to increase as age and body weight increased. Axial lengths increased rapidly until age 10, and then increased slowly. In emmetropic eyes, widths/axial lengths increased with age, but in myopic eyes these decreased as age or severity of myopia increased. Moreover, as age increased, the myopic population and severity also increased.

Conclusions: The axial length was longer in case of myopia compared to emmetropia in all age groups and there was almost no difference in the increase rate of axial length by the age of myopia and emmetropia. However, the width was wider in case of myopia compared to emmetropia in all age groups and the increase rate of width in myopia by age was smaller than that of emmetropia. Myopia showed decreasing rate of width/axial length with increase of age, from 1.004 in 5 years to 0.971 in 20 years. However, emmetropia showed increasing rate of width/axial length with increase of age, from 0.990 in 5 years to 1.006 in 20 years.

Show MeSH
Related in: MedlinePlus