An old woman who was a smoker had persistent joint pains and backache, making it difficult to walk. She also couldn't read small words in the Bible. During a medical exam, the doctor noted a problem with her eye lens and that the distance between the cornea and retina was shorter than expected. Her bones were also weak. (a) Explain why she couldn't easily read. (b) Advise her on managing her condition.

a) i) The old woman could not easily read small words due to two main reasons. Firstly, the problem with her eye lens indicates presbyopia, an age-related condition where the lens loses its elasticity and ability to change shape to focus on near objects. Secondly, the shorter distance between the cornea and retina means that light rays from near objects focus behind the retina, a condition known as hyperopia (farsightedness). Both conditions result in blurred vision for close-up tasks like reading. ii) The blinking response to the doctor's torch light was a reflex action. When the bright light stimulated the photoreceptors in her retina, nerve impulses were generated. These impulses traveled along sensory neurons to the brain. In the brain, the impulses were processed and transmitted via motor neurons to the muscles of her eyelids (orbicularis oculi). The contraction of these muscles caused her to blink, protecting her eyes from the intense light. b) To manage the health condition causing difficulty in walking, which includes persistent joint pains, backache, and weak bones (likely osteoporosis and possibly arthritis), the old woman should: • Stop smoking immediately, as smoking significantly worsens bone density and overall health. • Ensure a diet rich in calcium (e.g., dairy products, leafy greens) and Vitamin D (e.g., fatty fish, fortified foods, sunlight exposure) to strengthen bones. • Engage in regular, low-impact weight-bearing exercises like walking or gentle strength training, as advised by a doctor or physical therapist, to improve bone density, muscle strength, and joint flexibility. • Consult a doctor for appropriate medication to manage pain, reduce inflammation in joints, and treat osteoporosis (e.g., bisphosphonates). • Consider physical therapy to learn exercises that improve balance, posture, and reduce strain on joints and the back.