18:31
Cataracts Nursing NCLEX Eye Disorders Review | Cataracts Surgery, Symptoms, Medications
RegisteredNurseRN
Overview
This video provides a comprehensive review of cataracts, an eye disorder characterized by clouding of the lens that impairs vision. It details the pathophysiology, causes, signs and symptoms, diagnostic methods, and treatment options, with a particular focus on the nursing role in patient education and care before, during, and after cataract surgery. The content is geared towards nursing students preparing for exams like the NCLEX.
How was this?
Save this permanently with flashcards, quizzes, and AI chat
Chapters
- Cataracts occur when the eye's lens loses transparency, becoming cloudy and scattering light.
- This scattering prevents light from focusing clearly on the retina, leading to blurry, murky vision.
- Cataracts are common, especially in older adults, affecting over half of those 80 and older.
- Vision loss due to cataracts is often reversible with surgery.
Understanding the fundamental nature of cataracts helps learners grasp why symptoms occur and why interventions are necessary.
A person with cataracts sees a cat as blurry and less vibrant compared to a clear, colorful image seen by someone with normal vision.
- Light enters the eye through the cornea, passes through the iris and pupil (whose size is controlled by the iris), and then reaches the lens.
- The lens, normally clear due to proteins called crystallines, focuses light onto the retina via ciliary muscles for accommodation.
- In cataracts, crystallines clump together, causing the lens to become cloudy and scatter light.
- This scattering prevents clear image formation on the retina, leading to gradual vision decline.
Knowing the eye's structures and how light normally travels through them clarifies how a cloudy lens disrupts vision.
The lens in a cataractous eye is compared to a dirty window, where light scatters instead of passing through clearly.
- Common causes include aging (senile cataracts), congenital factors (e.g., maternal rubella), and trauma.
- Diseases like uncontrolled diabetes, prolonged unprotected sun exposure, and certain medications (e.g., corticosteroids) are risk factors.
- Lifestyle choices such as heavy smoking, high alcohol consumption, and a family history also increase risk.
Identifying the diverse causes and risk factors allows nurses to educate patients on prevention and recognize individuals at higher risk.
Unprotected exposure to sunlight over time can damage the eye's proteins, contributing to cataract formation.
- C - Cloudy, blurry vision, and potential double vision in one eye.
- A - Acquiring frequent changes in eyeglass prescriptions.
- T - Toned-down colors, appearing washed out or faded.
- S - Sensitivity to glare and light, with halos around lights, often worse at night, impacting activities like driving.
The 'CATS' mnemonic provides a memorable framework for nurses to quickly identify and assess potential cataract symptoms in patients.
A patient reports difficulty driving at night because bright headlights seem excessively glaring and painful.
- Diagnosis involves visual acuity tests (Snellen chart), slit lamp examinations to view eye structures, and ophthalmoscopy after pupil dilation.
- Initial management may involve monitoring, updated eyeglasses, anti-glare glasses, sunglasses, and magnifiers.
- Surgery is recommended when cataracts significantly interfere with daily activities.
- Phacoemulsification, a common surgery, uses ultrasound to break up and remove the cloudy lens, replacing it with an intraocular lens (IOL).
Understanding diagnostic tools and treatment progression helps nurses guide patients through the management process and prepare them for surgery.
A slit lamp allows an ophthalmologist to magnify and examine the cornea, iris, and lens for signs of cloudiness.
- Nurses educate patients on cataract prevention using the 'LENS' mnemonic (Layers of protection, Eating well, No smoking/reduced alcohol, Schedule exams).
- Pre-operative education includes explaining the outpatient nature of surgery, NPO status, need for a driver, and proper eye drop instillation techniques (timing, punctal occlusion).
- Post-operative care involves positioning on the non-surgical side, wearing eye shields/glasses, administering prescribed eye drops (antibiotics, anti-inflammatories), and avoiding activities that increase intraocular pressure.
- Patients should report severe pain, sudden vision decrease, flashes, floaters, or purulent drainage, as these may indicate complications.
This chapter highlights the critical role nurses play in patient safety, education, and monitoring throughout the cataract surgical journey.
Nurses demonstrate punctal occlusion to patients, teaching them to gently press on the tear duct after instilling drops to minimize systemic absorption.
- Pre-operative pupil dilation often uses mydriatics (e.g., phenylephrine) and cycloplegics (e.g., to paralyze ciliary muscles).
- Alpha-blockers like tamsulosin can cause 'intraoperative floppy iris syndrome,' complicating dilation and surgery.
- Post-operative care includes pain management (acetaminophen), managing itching without rubbing, and monitoring for signs of infection or retinal detachment.
- Regular follow-up appointments are crucial to ensure proper healing and check for increased intraocular pressure.
Awareness of specific medications, their effects, and potential complications is vital for nurses to anticipate issues and ensure patient safety during and after cataract surgery.
If a male patient takes tamsulosin (Flomax) for prostate issues, the nurse must inform the ophthalmologist due to the risk of intraoperative floppy iris syndrome during cataract surgery.
Key takeaways
- Cataracts are a clouding of the lens that impairs vision by scattering light, leading to blurry and less vibrant sight.
- Aging is the primary cause, but diabetes, sun exposure, trauma, and certain medications also contribute.
- The 'CATS' mnemonic (Cloudy vision, Acquired prescription changes, Toned-down colors, Sensitivity to glare) helps identify key symptoms.
- While non-surgical management involves supportive measures, cataract surgery, typically phacoemulsification with IOL implantation, is highly effective for restoring vision.
- Nurses play a crucial role in patient education for prevention (LENS mnemonic) and in managing pre- and post-operative care, including meticulous eye drop administration and monitoring for complications.
- Understanding potential drug interactions, like alpha-blockers affecting pupil dilation, is essential for surgical safety.
- Vision loss from cataracts is often reversible, emphasizing the importance of timely diagnosis and treatment.
Key terms
CataractLensRetinaCrystallinesPhacoemulsificationIntraocular lens (IOL)MydriaticsCycloplegicsIntraoperative floppy iris syndromePunctal occlusion
Test your understanding
- What is the primary mechanism by which cataracts impair vision?
- How does uncontrolled diabetes contribute to the development of cataracts?
- Explain the significance of the 'CATS' mnemonic for recognizing cataract symptoms.
- What are the key nursing responsibilities before and after cataract surgery?
- Why is it important for a nurse to know if a patient is taking tamsulosin before cataract surgery?