Eye diseases are not limited to older adults, and many serious conditions cause little or no discomfort in their early stages. For residents of Alhambra, regular eye examinations, protection from ultraviolet light, careful management of health conditions, and attention to sudden vision changes can help preserve sight.
Which eye diseases are most common?
The conditions most often associated with vision loss include cataracts, glaucoma, age-related macular degeneration, diabetic retinopathy, and dry eye disease. Some are linked mainly to aging, while others are influenced by diabetes, smoking, family history, medications, screen habits, or environmental exposure.
A person may have more than one condition at the same time. For example, someone with diabetes may have a higher risk of cataracts, glaucoma, and diabetic retinopathy.
What are cataracts, and can they be prevented?
Cataracts develop when the normally clear lens inside the eye becomes cloudy. They can cause hazy vision, glare around headlights, faded colors, and difficulty seeing in low light. Cataracts usually develop gradually and are most common with aging, although diabetes, smoking, eye injuries, steroid use, and long-term sun exposure can increase risk.
Cataracts cannot always be prevented, but several habits may delay their development:
- Wear sunglasses that block 99% to 100% of ultraviolet A and ultraviolet B rays.
- Use a brimmed hat during extended outdoor activities.
- Avoid smoking and secondhand smoke when possible.
- Keep diabetes and blood pressure under control.
- Use appropriate eye protection during home repairs, yard work, or activities involving dust, chemicals, or flying particles.
Bright sunlight and reflective surfaces can increase ultraviolet exposure even on cooler or overcast days. Sunglasses are useful throughout the year, not only during summer.
Why is glaucoma difficult to detect?
Glaucoma damages the optic nerve, often through a buildup of pressure inside the eye. Open-angle glaucoma, the most common form, usually develops slowly and may not cause pain, redness, or noticeable vision changes at first. Peripheral vision can gradually narrow before a person realizes there is a problem.
There is no guaranteed way to prevent glaucoma, but early detection can help prevent or delay permanent vision loss. Risk is higher with age, a family history of glaucoma, diabetes, and certain racial or ethnic backgrounds.
A comprehensive eye examination can include pressure measurement, examination of the optic nerve, visual field testing, and other evaluations based on personal risk. Normal eye pressure does not always rule out glaucoma, so several parts of the examination matter.
Sudden severe eye pain, halos around lights, nausea, vomiting, and rapidly declining vision can indicate an urgent form of glaucoma and require immediate medical attention.
How does diabetes affect the eyes?
Diabetic retinopathy occurs when high blood sugar damages the tiny blood vessels in the retina, the light-sensitive tissue at the back of the eye. Early diabetic retinopathy often has no symptoms. Later signs may include blurry vision, dark spots, difficulty reading, distorted images, or areas of missing vision.
The risk can be reduced by:
- Keeping blood sugar within the range recommended by the diabetes care team.
- Managing blood pressure and cholesterol.
- Avoiding smoking.
- Staying physically active as medically appropriate.
- Completing recommended dilated eye examinations, often at least once a year.
People with diabetes should not wait for vision changes before being examined. The retina may be damaged before eyesight seems different. Pregnancy can also change the timing of recommended eye monitoring for people with diabetes.
What is age-related macular degeneration?
Age-related macular degeneration, often called AMD, affects the macula, the central part of the retina responsible for detailed vision. It can make reading, recognizing faces, or seeing fine details more difficult. AMD usually does not cause complete darkness, but it can interfere with central vision.
Risk increases with age and family history. Smoking is a significant avoidable risk factor. Helpful steps include not smoking, eating a varied diet with vegetables and fish, protecting the eyes from ultraviolet light, and managing cardiovascular risk factors.
A straight line that suddenly appears wavy, a new blurry spot in the center of vision, or a sudden change in detail vision should be evaluated promptly. Some forms of AMD can progress quickly and benefit from early treatment.
Why do eyes feel dry or irritated?
Dry eye disease occurs when the eyes do not produce enough tears or when tears evaporate too quickly. Symptoms may include burning, gritty sensations, fluctuating vision, watering, redness, and sensitivity to light.
Long periods of screen use can contribute because people tend to blink less while reading or concentrating. Indoor heating, air conditioning, dust, wind, and low humidity may also worsen symptoms. In a dense urban environment, household exposure to indoor air movement and outdoor particles can make irritation more noticeable for some residents.
Practical measures include taking regular visual breaks, blinking fully, keeping screens slightly below eye level, avoiding direct airflow toward the face, and maintaining clean contact lens habits. The 20-20-20 approach—looking about 20 feet away for 20 seconds every 20 minutes—can reduce digital eye strain, although it does not treat every cause of dry eye.
Persistent pain, significant redness, light sensitivity, or reduced vision should not be assumed to be ordinary dryness.
How often should people have eye examinations?
The appropriate schedule depends on age, health, family history, medications, and previous findings. Children need vision screening at appropriate developmental stages. Adults may need periodic comprehensive examinations even when they see clearly, because glaucoma, diabetic eye disease, and AMD can begin without obvious symptoms.
People with diabetes, high blood pressure, a family history of glaucoma, or previous eye disease may require more frequent monitoring. A dilated examination allows the clinician to view the retina and optic nerve more thoroughly than a basic vision check alone.
An eye examination can also reveal clues related to broader health concerns, including diabetes and vascular disease.
Which vision changes require urgent attention?
Certain symptoms should be evaluated quickly rather than watched at home:
- A sudden increase in floaters or flashes of light.
- A curtain-like shadow or missing area of vision.
- Sudden loss of vision in one or both eyes.
- Severe eye pain, marked redness, or nausea.
- New double vision.
- A sudden change in the appearance of straight lines.
- Eye injury involving chemicals, sharp objects, or high-velocity particles.
Chemical exposure requires immediate flushing with clean water while seeking urgent medical guidance. Rubbing the eye can worsen an injury.
Protecting vision is not based on a single food, supplement, or screen setting. It depends on combining routine examinations with sun protection, safe eye habits, smoking avoidance, healthy management of diabetes and blood pressure, and prompt attention to changes that are sudden or unusual.