Table of Contents
What is a positive Seidel sign?
When instilled into the eye, the dye is taken up by defects in the cornea, such as abrasions or lacerations. Seidel test is positive when the fluorescein dilutes in the aqueous humor and causes it to fluoresce bright green and stream down the eye with gravity.
How do you perform a Sidel test?
Technique
- Explain the procedure to the patient.
- Clean off the slit lamp and position the patient.
- Gently apply a topical anesthetic eye drop.
- Using a cotton tipped applicator, carefully dry the area of the suspected leak.
- Carefully apply a moistened fluorescein strip to the area of the suspected leak, “painting” on the dye.
How do you assess corneal abrasion?
On exam, corneal abrasions can be associated with redness, light sensitivity, excessive lacrimation, decreased visual acuity. Fluorescein staining is the most helpful clinical tool to assess corneal abrasion. The dye will get caught in the corneal abrasion and fluoresce under cobalt blue light.
What causes lacerations in eyes?
Corneal lacerations are typically caused by cutting wood, trimming grass, grinding metal or other similar activities – the edge of a piece of paper can cut through the cornea if enough force is involved, and can usually be prevented by wearing protective eye wear.
Which of the following are signs of a corneal laceration?
Signs and symptoms of a corneal laceration after trauma are decreased vision, ocular pain, a positive Seidel test, irregular pupil such as a peaked or teardrop pupil, intraocular foreign body, and prolapse of intraocular contents.
What causes corneal abrasion?
A corneal abrasion is a superficial scratch on the clear, protective “window” at the front of your eye (cornea). Your cornea can be scratched by contact with dust, dirt, sand, wood shavings, metal particles, contact lenses or even the edge of a piece of paper.
Can corneal abrasion be seen?
Although it is very difficult to see a corneal abrasion with the naked eye, you have to be suspicious of this if you have experienced any of the causes of trauma mentioned above. Along with that is the unrelenting painful feeling that something is in your eye that just won’t wash out, plus: Lots of watery tearing.
What is a rust ring in the eye?
Corneal rust rings occur commonly when metallic foreign bodies become embedded in the cornea. Removal of the rust ring is imperative to avoid permanent staining of the cornea, persistent inflammation, or disruption of corneal integrity (necrosis) with loss of stromal substance.
Can hypopyon be cured?
Hypopyon is associated with nearly 85% cases of acute endophthalmitis and therefore warrants prompt ophthalmology consultation for surgical intervention and initiation of intravitreal antibiotics. Treatment upon discharge typically involves intensive topical steroids and topical antibiotics.
How do you record gonio results?
When documenting your gonioscopy findings, draw a large X to designate the four quadrants. Record the most posterior structure youve observed in each quadrant, and record the abnormalities and amount of pigment. Also, use the van Herick system for grading angle depth.
What are the indications for fluorescein staining?
Abnormal tear production (dry eye) Blocked tear duct. Corneal abrasion (a scratch on the surface of the cornea) Foreign bodies, such as eyelashes or dust (foreign object in eye)