1) Visual & Ocular Causes
- Presbyopia: reduced near focus makes small print tiring without magnification or bright light.
- Dry eyes: burning/irritation worsens with prolonged reading; blinking rate drops.
- Cataracts, macular degeneration, glaucoma: lower contrast sensitivity, field loss, blur → eye strain.
- Poor lighting: aging eyes may need up to ~3× more light for the same clarity; avoid flicker and glare.
2) Neurological & Cognitive Factors
- Slower visual processing: letters/words take longer to parse, so reading feels effortful.
- Mild cognitive impairment / early dementia: reduced comprehension, word recall, attention.
- Medication effects (e.g., sedatives, antihypertensives, anticholinergics): blur vision or reduce alertness.
- Vestibular issues: words can appear to “move,” especially with bifocals or post-stroke.
3) Physical Fatigue & Posture
- Neck/back pain from long sessions or awkward posture.
- Arthritis or tremor makes it hard to hold books or turn pages.
- General fatigue: sustained attention drains energy faster in older adults.
4) Emotional & Motivational Aspects
- Anxiety/frustration about declining ability amplifies discomfort.
- Depression or apathy lowers motivation, makes reading feel exhausting.
- Social isolation: reading alone can feel less purposeful.
Practical Adjustments That Help
- Try large‑print books or an e‑reader (adjust font, spacing, contrast).
- Use warm, steady task lighting from behind/above the shoulder.
- Read in short, rested sessions with timed breaks (e.g., 20–30 minutes).
- Lubricate eyes and blink consciously; stay hydrated.
- Optimize posture with a stand/pillow; lighten the device (tablet/holder).
- Ask an optometrist/geriatrician to check for treatable causes and update lenses.
Tip: Audiobooks and read‑aloud features (on Kindle/iPad) preserve the joy of stories when print is tiring.
When to Seek Medical Advice
- Sudden vision changes, double vision, or new headaches.
- Rapid decline in reading endurance or comprehension.
- Eye pain, marked redness, or frequent tearing/burning unrelieved by basic measures.