Myopia Measurement Errors and Progression in Young Adults

Q: Myopia Measurement Errors and Progression in Young Adults

Hello： 1. A variation of plus or minus 25 degrees is considered normal. This change may be due to measurement errors or other factors. The refractor also plays a role, and it does not necessarily indicate a worsening of myopia. 3. Although myopia often progres

Measurement errors in myopia?

1.
Last month, I went to the ophthalmologist for a dilated eye exam, and my prescription was L: -6.50, R: -5.75.
However, this month, when I went to get glasses, the prescription changed to L: -6.75, R: -6.00.
Is it possible for my prescription to increase by 0.25 diopters in just one month?
2.
Is this a measurement error or an indication of worsening myopia?
3.
I am 18 years old, and although I have had myopia around -5.00 to -6.00 since the sixth grade, it has not worsened until now.
Recently, I visited the ophthalmologist and requested a dilating agent, but the doctor said it was pointless and that my myopia would not worsen anymore.
Is his statement correct?
4.
If I maintain good visual habits, will my prescription not worsen easily?

Xiao Chen, 10~19 year old female. Ask Date: 2023/05/26

Dr. Gao Pilin reply Ophthalmology

Hello: 1.
A variation of plus or minus 25 degrees is considered normal.
This change may be due to measurement errors or other factors.
The refractor also plays a role, and it does not necessarily indicate a worsening of myopia.
3.
Although myopia often progresses during youth, it does not mean that everyone will experience the same changes.
Each individual's eyes have different physiological characteristics and patterns of change.
The ophthalmologist's observations are based on their assessment of your eye condition; if there has been no significant increase over time, there is usually no need for further refraction after the age of 18, and continued monitoring is sufficient.
4.
Good visual habits can contribute to eye health, but they may not completely prevent the progression of myopia.
The development of myopia is influenced by multiple factors, including genetics, environmental factors, and personal lifestyle habits.
While good visual habits (such as maintaining an appropriate reading distance, taking timely breaks, and performing eye exercises) are important for eye health, they may not fully prevent an increase in refractive error.

Reply Date: 2023/05/26

More Info

Understanding myopia, or nearsightedness, is crucial, especially for young adults who may experience changes in their vision. Your questions touch on several important aspects of myopia measurement, progression, and management. Let's break down your concerns one by one.

1. Measurement Variability: The difference in your prescription from L:650 R:575 to L:675 R:600 within a month raises questions about measurement accuracy. It is indeed possible for myopia to progress, but a change of 25 degrees (or diopters) in just one month is unusual and may suggest measurement error rather than a true increase in myopia. Factors such as the method of measurement (manual vs. automated), the state of your eyes during the exam (e.g., fatigue, hydration), and even the skill of the technician can influence the results. It is advisable to have a consistent method of measurement and possibly seek a second opinion if such discrepancies continue.

2. True Progression vs. Measurement Error: If your vision has not noticeably worsened in terms of symptoms (like difficulty seeing at a distance), it may lean more towards measurement error. However, myopia can progress, especially during periods of rapid growth or increased visual demands, such as prolonged screen time. Regular eye exams are essential to monitor any changes accurately.

3. Stability of Myopia: At 18 years old, it is common for individuals to experience stabilization of myopia. Many eye care professionals believe that myopia can stabilize in late adolescence or early adulthood. However, this is not universally true for everyone. Your eye doctor’s assertion that myopia will not worsen may be based on your current stability and age, but it is essential to maintain regular check-ups to monitor your vision. If you have a family history of progressive myopia or if you engage in activities that strain your eyes, it may be prudent to remain vigilant.

4. Good Eye Habits: Maintaining good eye health practices can indeed help manage myopia progression. This includes taking regular breaks during prolonged near work (the 20-20-20 rule: every 20 minutes, look at something 20 feet away for 20 seconds), ensuring proper lighting while reading or using screens, and engaging in outdoor activities. Studies have shown that increased time spent outdoors may help reduce the risk of myopia progression in children and young adults.

In conclusion, while your recent prescription changes could indicate either measurement error or true progression, the significant change in a short time frame suggests a need for further evaluation. It is essential to have a comprehensive eye exam with a qualified optometrist or ophthalmologist who can provide a thorough assessment of your eye health and vision. They can also discuss the best strategies for managing your myopia, including potential interventions like orthokeratology (special contact lenses worn overnight to reshape the cornea) or atropine eye drops, which have been shown to slow myopia progression in some cases. Regular follow-ups are key to ensuring your vision remains stable and healthy as you transition into adulthood.

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