Diagnosis of Cornea disorders
Cornea disorders Diagnosis: Book Excerpts
Diagnostic Tests for Cornea disorders: Online Medical Books
16 MEDICAL BOOKS ONLINE!
Review excerpts from medical books online, free, without registration,
for more information about diagnostis of Cornea disorders.
Corneal reflex, absent:
History and physical examination
(Handbook of Signs & Symptoms (Third Edition))
If you can't elicit the corneal reflex, look for other signs of trigeminal nerve dysfunction. To test the three sensory portions of the nerve, touch each side of the patient's face on the brow, cheek, and jaw with a cotton wisp, and ask him to compare the sensations.
If you suspect facial nerve involvement, note if the upper face (brow and eyes) and lower face (cheek, mouth, and chin) are weak bilaterally. Lower motor neuron facial weakness affects the face on the same side as the lesion, whereas upper motor neuron weakness affects the side opposite the lesion — predominantly the lower facial muscles.
Because an absent corneal reflex may signify such progressive neurologic disorders as Guillain-Barré syndrome, ask the patient about associated symptoms — facial pain, dysphagia, and limb weakness.
» READ BOOK EXCERPT ONLINE »
Source: Handbook of Signs & Symptoms (Third Edition), 2006
Corneal abrasion:
Diagnosis
(Professional Guide to Diseases (Eighth Edition))
History of eye trauma or prolonged wearing of contact lenses and typical symptoms suggest corneal abrasion.
Confirming diagnosis Staining the cornea with fluorescein stain confirms the diagnosis: The injured area appears green when examined with a flashlight. Slit-lamp examination discloses depth and allows measurement of the abrasion.
Examining the eye with a flashlight may reveal a foreign body on the cornea; the eyelid must be everted to check for a foreign body embedded under the lid.
Before beginning treatment, a test to determine visual acuity provides a medical baseline and a legal safeguard.
» READ BOOK EXCERPT ONLINE »
Source: Professional Guide to Diseases (Eighth Edition), 2005
Corneal ulcers:
Diagnosis
(Professional Guide to Diseases (Eighth Edition))
A history of trauma or use of contact lenses and flashlight examination that reveals irregular corneal surface suggest corneal ulcer. Exudate may be present on the cornea, and a hypopyon (accumulation of white cells in the anterior chamber) may appear as a white crescent moon that moves when the head is tilted.
Confirming diagnosis Fluorescein dye, instilled in the conjunctival sac, stains the outline of the ulcer and confirms the diagnosis.
Culture and sensitivity testing of corneal scrapings may identify the causative bacteria or fungus, and may indicate appropriate antibiotic or antifungal therapy.
» READ BOOK EXCERPT ONLINE »
Source: Professional Guide to Diseases (Eighth Edition), 2005
Corneal reflex, absent:
History and physical examination
(Professional Guide to Signs & Symptoms (Fifth Edition))
If you can’t elicit the corneal reflex, look for other signs of trigeminal nerve dysfunction. To test the three sensory portions of the nerve, touch each side of the patient’s face on the brow, cheek, and jaw with a cotton wisp, and ask him to compare the sensations.
If you suspect facial nerve involvement, determine whether both the upper face (brow and eyes) and lower face (cheek, mouth, and chin) are weak bilaterally. Lower-motor-neuron facial weakness affects the face on the same side as the lesion, whereas upper-motor-neuron weakness affects the side opposite the lesion—predominantly the lower facial muscles.
Because an absent corneal reflex may signify such progressive neurologic disorders as Guillain-Barré syndrome, ask the patient about associated symptoms, such as facial pain, dysphagia, and limb weakness.
» READ BOOK EXCERPT ONLINE »
Source: Professional Guide to Signs & Symptoms (Fifth Edition), 2006
Corneal abrasion:
Diagnosis
(Handbook of Diseases)
A history of eye trauma or prolonged wearing of contact lenses as well as typical symptoms suggest corneal abrasion. Staining the cornea with fluorescein stain confirms the diagnosis: The injured area appears green when examined with a Wood’s lamp or black light. Slit-lamp examination discloses the depth of the abrasion.
Examining the eye with a flashlight may reveal a foreign body on the cornea; the eyelid must be everted to check for a foreign body embedded under the lid.
Before beginning treatment, a test to determine visual acuity provides a medical baseline and a legal safeguard.
» READ BOOK EXCERPT ONLINE »
Source: Handbook of Diseases, 2003
Corneal ulcers:
Diagnosis
(Handbook of Diseases)
A history of trauma or use of contact lenses and a flashlight examination that reveals an irregular corneal surface suggest corneal ulcer. Exudate may be present on the cornea, and a hypopyon (accumulation of white cells in the anterior chamber) may appear as a half-moon.
Fluorescein dye, instilled in the conjunctival sac, delineates the outline of the ulcer. Culture and sensitivity testing of corneal scrapings, which may identify the causative bacteria or fungus, indicate appropriate antibiotic or antifungal therapy.
» READ BOOK EXCERPT ONLINE »
Source: Handbook of Diseases, 2003
Corneal reflex, absent:
History and physical examination
(Nursing: Interpreting Signs and Symptoms)
If you can't elicit the corneal reflex, look for other signs of trigeminal nerve dysfunction. To test the three sensory portions of the nerve, touch each side of the patient's face on the brow, cheek, and jaw with a cotton wisp, and ask him to compare the sensations.
If you suspect facial nerve involvement, note if the upper face (brow and eyes) and lower face (cheek, mouth, and chin) are weak bilaterally. Lower motor neuron facial weakness affects the face on the same side as the lesion, whereas upper motor neuron weakness affects the side opposite the lesion—predominantly the lower facial muscles.
Because an absent corneal reflex may signify such progressive neurologic disorders as Guillain-Barré syndrome, ask the patient about associated symptoms—facial pain, dysphagia, and limb weakness.
» READ BOOK EXCERPT ONLINE »
Source: Nursing: Interpreting Signs and Symptoms, 2007
When you reach a certain age, it's usually clear that your vision isn't as sharp as it used to be. Learn how surgery for the cloudy lens of a...
Aging can often mean losing the ability to read up close. But does that mean a life of looking for lost glasses? Learn what other options are...
Sexual contact can sometimes result in problems. An unwanted pregnancy or sexually transmitted diseases may be some of those consequences. But by...
Health insurance is important to everyone, especially people with chronic conditions like Crohn's disease and ulcerative colitis. Tune in to...
See full list of 4 related videos
» Next page: Signs of Cornea disorders
Rate This Website
What do you think about the features of this website?
Take our user survey and have your say:
Website User Survey
Medical Tools & Articles:
Next articles:
Tools & Services:
Medical Articles:
Forums & Message Boards
- Ask or answer a question at the Boards:
