Final answer:
The specific average accommodative lag for patients with Down syndrome is not stated in the provided reference material. However, a normal eye shows an 8% increase in power to accommodate close vision. Accurate information regarding Down syndrome’s specific accommodative lag would require additional medical studies or consultations with an optometrist.
Step-by-step explanation:
The question pertains to the average accommodative lag for patients with Down syndrome. In a normal eye, there is an 8% increase in power from the relaxed state to accommodate close vision. This adjustment allows people to focus on objects at various distances. Typically, a person around 40 years old has this 8% ability to accommodate, but this ability changes with age. For individuals with Down syndrome, there may be a different average accommodative lag, which is generally assessed by an optometrist during an eye examination. It is important to note factors such as the age of the individual and the presence of other vision-related conditions that may influence the accommodative performance in Down syndrome.
However, the specific average accommodative lag for individuals with Down syndrome is not provided in the reference material, implying that the question may require specialized knowledge in Down syndrome’s ophthalmologic characteristics, which may vary from the normal population. To obtain accurate information, a look into recent medical studies or consultations with an optometrist experienced in treating patients with Down syndrome would be advisable.