What is phacoemulsification for cataracts?
Conventional, ultrasound cataract surgery For decades now, conventional cataract surgery has involved the use of ultrasound energy, delivered by the tip of one of the small surgical instruments, to break down the old lens (a process called “phacoemulsification”). The fragments of the old lens are then “aspirated” away – literally, sucked out.
What is a cataract and how is it treated?
Dec 21, 2017 · Phacoemulsification is the most common way of treating cataract. Following anesthesia, a small incision (two to three millimeters) is made and an ultrasound probe is inserted into the eye. The probe uses ultrasound waves to disintegrate the cloudy lens, and the pieces are removed through suction.
What is the laser used for in cataract surgery?
Tuning fork test to evaluate bone conduction of sound in both ears at the same time Weber Method of treating cataracts using ultrasonic waves to disintegrate cloudy lenses Phacoemulsification Abnormal overflow of tears Epiphora Small yellowish deposits on the macula in age-related macular degeneration Drusen
What are the different types of cataract surgery?
Aug 07, 2021 · One of them is to use phacoemulsification, a method that consists of using ultrasound waves to disintegrate the lens and then remove it through suction. Another may be extracapsular surgery, characterized by the removal of the lens in one piece, which requires a longer incision and, therefore, may take longer to heal.
Which surgical treatment for otosclerosis implants a prosthetic device that allows sound waves to pass the inner ear?
In an operation called a stapedectomy, a surgeon (otolaryngologist or otologist) bypasses the diseased bone with a prosthetic device that allows sound waves to be passed to the inner ear. Stapedotomy Laser stapedotomy is a well-established surgical technique for treating conductive hearing loss due to otosclerosis.
What is the process of altering the shape of the lens to enable light to focus on the retina called?
This adjustment in the lens, known as accommodation, is necessary for bringing near and far objects into focus. The process of bending light to produce a focused image on the retina is called “refraction”.
Which classification of drugs dilate the pupils for an internal eye examination or to treat inflammatory eye conditions?
Mydriatics are a class of drugs that cause pupil dilation. Sometimes called eye dilation drops, they're commonly used during eye exams and surgeries. Stimulants, such as Ritalin and Adderall, are common in the treatment of attention-deficit hyperactivity disorder (ADHD).Sep 25, 2019
Which disorder of the labyrinth leads to progressive loss of hearing group of answer choices?
Otosclerosis is a form of abnormal bone growth within the middle ear that causes progressive hearing loss.
What is ciliary epithelium?
The ciliary body is a part of the eye that includes the ciliary muscle, which controls the shape of the lens, and the ciliary epithelium, which produces the aqueous humor. The aqueous humor is produced in the non-pigmented portion of the ciliary body.
What is the name given to the reflex that changes the shape of the lens in the eye?
The accommodation reflex (or accommodation-convergence reflex) is a reflex action of the eye, in response to focusing on a near object, then looking at a distant object (and vice versa), comprising coordinated changes in vergence, lens shape (accommodation) and pupil size.
Which drug is used as mydriatics in ophthalmologic practice?
Most commonly used mydriatics are phenylephrine hydrochloride and tropicamide.
What drops are used to dilate pupils?
Tropicamide is used to dilate (enlarge) the pupil so that the doctor can see into the back of your eye. It is used before eye examinations, such as cycloplegic refraction and examination of the fundus of the eye. Tropicamide may also be used before and after eye surgery.Feb 1, 2022
What is Homatropine eye drops used for?
This medication is used before eye examinations (such as refraction), before and after certain eye surgeries, and to treat certain eye conditions (such as uveitis). It belongs to a class of drugs known as anticholinergics. Homatropine hydrobromide works by widening (dilating) the pupil of the eye.
Which treatment for cataracts uses ultrasonic waves?
Phacoemulsification occurs with the use of a phacoemulsification ultrasound probe. The device uses ultrasonic waves to break apart the cataract. In laser-assisted cataract surgery, a laser is used to first soften the lens. This makes it easier to break up the cataract with the probe.
How do you treat cholesteatoma naturally?
Cholesteatomas don't go away naturally. They usually continue to grow and cause additional problems. Once a cholesteatoma has been diagnosed, a regimen of antibiotics, ear drops, and careful cleaning of the ear will most likely be prescribed to treat the infected cyst, reduce inflammation, and drain the ear.
What is the procedure to correct for otosclerosis?
Surgery -- Surgery can be a highly effective treatment for otosclerosis. The procedure is called a "stapedectomy" (or "stapedotomy"). The procedure is intended to "bypass" the fixed part of the stapes bone by removing it, and replacing it with a new, mobile, prosthetic bone.
How to treat cataracts with phacoemulsification?
Following anesthesia, a small incision (two to three millimeters) is made and an ultrasound probe is inserted into the eye. The probe uses ultrasound waves to disintegrate the cloudy lens, and the pieces are removed through suction.
What is the most precise laser for cataract surgery?
Cataract surgery using a femtosecond laser is hailed as the most precise and most gentle procedure available today. The incision, the disintegration and the removal of the lens are all performed using a computer-assisted laser, the femtosecond laser .
How to prevent cataracts?
There aren’t any other effective ways of preventing cataracts other than avoiding certain factors that increase the risk of developing cataracts. These include: 1 Smoking and alcohol: As smoking has been proven to be linked to cataracts, kicking the habit – or not smoking in the first place – can help prevent them. The same applies to excessive alcohol consumption. 2 Diabetes: Diabetes is another risk factor. Key measures for preventing diabetes are a balanced diet, and getting enough sleep and regular exercise. If the disease has already been diagnosed, it must be treated without delay. 3 Eye injuries: Injuries to the eye also increase the risk of developing a cataract. This risk can be reduced by wearing goggles whenever you perform dangerous tasks (e.g. drilling or polishing). 4 UV radiation: To avoid damage from UV rays, you should always wear glasses with UV protection, especially when on vacation, at the tanning studio or in the mountains. A pair of sunglasses or ski goggles goes a long way towards protecting your eyes and effectively reduces the risk of developing cataracts. Please note that UV light and UV rays are also a risk on cloudy days. So make sure you always protect your eyes and your skin from UV rays, even on grey days.
How do you know if you have cataract surgery?
The first signs of cataracts are visual defects that look like a fog, and an increased sensitivity to light.
What are the factors that increase the risk of cataracts?
Diabetes: Diabetes is another risk factor. Key measures for preventing diabetes are a balanced diet, and getting enough sleep and regular exercise. If the disease has already been diagnosed, it must be treated without delay. Eye injuries: Injuries to the eye also increase the risk of developing a cataract.
How is cataract surgery performed?
Cataract surgery is normally performed as an outpatient procedure. First, a local anesthetic is administered in the affected area , either with eye drops or an injection. A general anesthetic is rare, and is given to children or in special cases such as when patients have a bad cough. Once the anesthetic has taken effect, the doctor will begin by removing the cloudy lens of the eye that is most affected and “anchor” the new, artificial lens in the eye. Surgery on the second eye will be performed at a later date – and only once the first eye has healed and is working properly. For the eye doctor to select a suitable artificial lens, they have to measure the affected eye precisely. That’s the only way to ensure that the operation can be performed without complications and the patient can then see as well as possible with the new lens. To achieve an optimum result, over 75 percent of all cataract surgeries are performed using medical equipment from ZEISS. Cataract treatment comprises many different steps and several kinds of devices – from diagnosis through to follow-up care. ZEISS offers the right products and solutions throughout the process to assist doctors as they treat cataract.
Is intracapsular cataract surgery obsolete?
Intracapsular cataract extraction has now become obsolete. It was performed until the 1960s, when it was replaced by extracapsular cataract extraction. Intracapsular cataract extraction involves the cloudy lens – and its capsule – being completely removed from the eye.
Types of cataracts
The eyeball is a very complex structure at a microscopic level. For this reason, cataracts can be classified according to the layer of the lens that’s involved.
Symptoms
Cataracts can appear in one or both eyes, although they do not form in unison, they are painless and, initially, they also do not affect vision. However, over time they get worse and visual acuity decreases. The most common symptoms are the following:
Causes and risk factors
The crystalline lens, also called the natural lens of the eye, is a structure composed of water and proteins, whose function is to focus light and create clear, sharp images. However, aging causes protein and dead cells to be stored in this part of the eye, forming the cataract and ultimately impairing vision.
Diagnosis
If cataracts are suspected, your doctor will perform a complete eye exam. This includes the following:
Treatment
Surgical procedures aimed at reversing cataracts are becoming less invasive and more effective. Furthermore, the incidence of complications is low.
Prevention
Although there are no therapies or medications to prevent cataracts, a number of habits may help you reduce your risk. Among them are not smoking, controlling diabetes, protecting the eyes from ultraviolet rays, visiting the ophthalmologist regularly and consuming antioxidants and omega-3 fatty acids.