Supression 2 Flashcards
(16 cards)
What is suppression in the context of vision?
Sensory adaptation to overcome visual symptoms like diplopia and confusion
Suppression involves cortical inhibition of visual sensation in one eye in favor of the other when both eyes are open.
What are the physiological and pathological reasons for suppression?
Physiological and pathological reasons
Physiological suppression can occur naturally, while pathological suppression is often due to visual disorders.
What is a suppression scotoma?
An area of visual field loss where the brain ignores visual input from one eye
This can occur in conditions like strabismus.
How can suppression be measured?
By assessing presence, area, and density
These measurements help in understanding the extent and impact of suppression on vision.
What is one treatment option for patients with suppression?
No treatment
This is appropriate for stable, asymptomatic patients with small angle strabismus.
When should elimination of suppression be considered?
In cases of intermittent deviations needing treatment, decompensating heterophoria, and late onset esotropia with evidence of binocular single vision
These conditions may benefit from addressing suppression.
What are contraindications to the elimination of suppression?
No binocular potential, older patients with dubious binocular potential, and the presence of abnormal binocular single vision
These factors can complicate treatment and may not yield positive outcomes.
What is the purpose of using a septum in suppression treatment?
To aid awareness of two eyes and promote diplopia
A septum is held up between the eyes to encourage the patient to notice the visual input from both eyes.
What are red and green goggles used for in suppression treatment?
To help demonstrate diplopia and promote awareness of the suppressed eye
The goggles allow the patient to see images from the strabismic eye while aiming to maintain diplopia.
What role do prisms play in the treatment of suppression?
To move the image out of the suppression scotoma
Small vertical prisms can help promote diplopia by shifting the visual input.
What is the red filter drawing technique?
A method to encourage the use of the suppressed eye by having the patient draw with a red pen while wearing a red filter over the fixing eye
This technique makes the red pen visible only to the suppressed eye.
What is the synoptophore used for?
To promote awareness of diplopia and the suppressed eye
It uses a rheostat to dim the image in front of the fixing eye, encouraging the patient to recognize the suppressed eye.
What is a new technology used in the measurement and treatment of suppression?
Dichoptic viewing
This technology aims to equalize the image seen by each eye by varying contrast.
What is the goal of using Bangerter foils in suppression treatment?
To encourage suppression
They can be gradually reduced to maintain the effects of suppression.
How can botulinum toxin (BT) be used in suppression treatment?
To temporarily change eye alignment and move the diplopic image back into the suppression area
This encourages the maintenance of suppression as the effects of BT wear off.
What is the ultimate goal of suppression treatment?
To eliminate suppression, promote diplopia, and restore or encourage deeper suppression if lost
The treatment strategy varies based on patient symptoms and visual capabilities.
