Purpose: Amplitude of accommodation varies with race and ethnicity and Hofstetter’s
equations are commonly used in Nigeria to calculate expected amplitude of accommodation for clinical purposes. The aim of this study was to present normative values for amplitude of accommodation for Nigerian children and to compare the measured values with
those calculated using Hofstetter’s equations.
Methods: A total of 688 children aged six to 16 years from three selected cities in Nigeria
were included in the study. Push-up technique was employed to measure the amplitude of
accommodation. The measured values were compared with the calculated values
(Hofstetter’s equations) using the paired t-test and Bland and Altman plots.
Results: The measured amplitude of accommodation for the subjects ranged from 8.00 to
25.00 D with a mean of 15.88 3.46 D. The calculated minimum amplitude of accommodation ranged from 11.00 to 13.50 D with a mean of 12.09 0.55 D and the calculated
average amplitude of accommodation ranged from 13.17 to 16.50 D with a mean of
14.62 0.73 D. The calculated maximum amplitude of accommodation ranged from
18.60 to 22.60 D with a mean of 20.34 0.88 D. The t-test indicated a significant difference between the measured and calculated minimum, average and maximum amplitudes
of accommodation (p < 0.0001). Also, the Bland–Altman plot suggested that there was a
lack of agreement between the measured and calculated amplitudes of accommodation.
Conclusion: The mean values of amplitude of accommodation in this study are different
from those reported in the literature. Also, the measured values differed from the calculated values using Hofstetter’s equation. This suggests that the use of Hosftetter’s equations to predict amplitude of accommodation may not be accurate for Nigerian children.
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Also, he was better at listening. As a parent, we wanted learning to be fun for our Son, and vision therapy made this possible.
Vision Therapy is well worth the expense, time and effort. Our son had a hard time focusing handwriting neatly. After vision therapy Seth could complete a task in half the time it previously took his abilities to focus and improved greatly and so did his handwriting.
Also, he was better at listening. As a parent you wanted learning to be fun for our son and vision therapy made this possible.
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When we first came to the practice, my son did not have huge issues, but lots of small ones- trouble with reading, sports (hitting the baseball consistently), coordination, etc- that were not easily detectable,but when put together presented issues. The staff here were all very professional and loving towards him. While I was concerned in the reading, my son was concerned with the athletic side. Seeing improvement night off the bat gave him confidence that i have nor seen in him and made him want to not only Come to therapy, but also made him want to work hard. He has surpassed his grade level and above in reading and hit his first home run this year! Thank you!!!
As an optometrist at Amplify EyeCare Chattanooga in Hixson, one of the most common questions Dr. Heather McBryar often encounters is: "Are carrots good for your eyes?" To put it simply, yes, carrots are indeed beneficial for your eyes. Carrots are known to improve eyesight, and this is largely due to the wealth of vitamins […]
Is foggy vision troubling you? Let our experienced optometrist restore your sight – book an appointment today and see the difference! The term foggy vision often refers to a visual disturbance characterized by blurred, cloudy, or hazy vision, which can make seeing clearly challenging. As your local optometrist, we recognize the significance of maintaining optimal […]
According to the National Eye Institute, nystagmus affects approximately 0.24% of the general population in the United States. This means a whopping 720,000 individuals in the US face the challenges of nystagmus. How does Nystagmus Impact Vision? Nystagmus is a condition that affects the eyes, causing involuntary and rapid movements that can make it difficult to […]
