What should I pay attention to when using an ophthalmoscope? Why can t you see the fundus under opht

It will be easier to observe the fundus after pupil dilation, and then teach you a simple method, use the fundus mirror to look at your palm prints or find an inkwell to drill a small hole on the bottom of the bottom and write a few words. Another way is to find a fresh sheep's head and observe the sheep's eyeballs, as long as you can see the fundus once, you will use the ophthalmoscope.

When examining the patient with ophthalmoscope, first adjust the turntable to +10d away from the eyeball to observe the cornea, iris, and lens, and then slowly turn the turntable from + to 0 to -.

It's ophthalmoscopy, right? An ophthalmoscope is a device used by an ophthalmologist to examine the fundus of a person's eye so that the doctor can see the blood vessels in the retina behind the eyeball and the optic nerve. This is the only place in the human body where blood vessels and nerves can be seen without an incision.

The medical team is examining the patient with an ophthalmoscope, which emits a very thin beam of light into the eye, and it has a magnifying glass that allows the doctor to see the part of the retina that the beam reaches. You can clearly and intuitively see the condition of the fundus, and you can better understand the lesions and specific conditions of the fundus.

The examination light of the ophthalmoscope is very strong, the patient will generally have temporary discomfort after the examination, it can be relieved after closing the eyes and resting, there is nothing special to pay attention to, in order to better see the situation around the fundus during the examination, the dilated pupil examination is required, and the patient will have a short period of blurred vision after the dilated pupils, which is mainly caused by the use of mydriatic drugs, and the effect of the drug can be recovered after disappearing.

There's nothing to pay attention to, you look straight ahead, wait until the doctor tells you to look at the light and then you look in the direction of the light source.

If the mesh is detached, indirect ophthalmoscopy is good because of stereoscopic vision. For example, direct ophthalmoscopy is generally sufficient. If there are manifestations such as microaneurysms, fundus fluorescence imaging is the best test.

Direct ophthalmoscopes are not three-dimensional and cannot be seen periphery, while indirect ophthalmoscopes allow for a more detailed examination.

Differences: Condenser: Direct ophthalmosis requires a condenser; Indirect ophthalmoscopy is not required.

Examination distance: direct ophthalmoscopy should be as close as possible to the patient's eyes; During indirect ophthalmoscopy, doctors should keep an arm's length from the patient.

Imaging differences: direct ophthalmoscopy imaging is an upright virtual image; Indirect ophthalmoscopy is an inverted real image.

Illumination: direct ophthalmoscopy does not have a high light intensity, so it is not suitable for patients with opacity of refractive media; Indirect ophthalmoscopy is brighter and can be used in patients with opacity of the refractive medium.

Visual range: about 2 times the diameter of the optic disc for direct ophthalmoscope; The visual range of indirect ophthalmoscope is about 8 times the diameter of the optic disc.

Stereoscopic observation: direct ophthalmoscopy cannot be used for stereoscopic observation; Indirect ophthalmoscopy allows for stereoscopic observation.

Visible fundus visual field: direct ophthalmoscopy can be observed slightly beyond the mid-latitude of the eye (sphere); Indirect ophthalmoscopy can be seen as far as the serrated edge of the retina.

Diabetic retinopathy can cause gradual vision deterioration and can be done if detected early**, but screening is important because patients have no symptoms at an early stage. The Taliri indirect ophthalmoscopy that I know of can achieve early prevention of diabetic retinopathy.

Fundus examination should be performed in a darkroom. It is a common examination method in ophthalmology to examine the refractive interstitium (cornea, aqueous humor, lens, and vitreous humor) and fundus (optic disc, retina, and choroid) of the eye. The examination is carried out in a dark room.

Pupil dilation is usually not necessary. If you need a detailed examination, you can drop 2% postmatropine solution 2 3 times or drop tropineamide 1 2 times to dilate the pupil.

Retinal detachment may be peripheral retinal detachment, or it may be **retinal detachment, if it is peripheral retinal detachment, if the pupil is not dilated, the pupil is small, and the ophthalmoscope is not clear, or even cannot be seen, which will delay the condition, so it is recommended to dilate the pupil to see the fundus.

Yes. An ophthalmoscope is an instrument that examines the fundus of the eye and observes the condition of the bottom of the eye, which is very helpful for many eye diseases.

Proper use of the ophthalmoscope:

The first step should be performed in a darkroom environment; If the examiner wears eyes, he or she should remove his glasses for examination; In older patients or patients who require detailed fundus examination, it is advisable to dilate pupils before examination (to rule out contraindications to mydriasis) when possible. When examining the right eye, hold the right hand with the mirror, stand on the patient's right hand, and observe with the right eye, and examine the left eye in the same way.

The second step is that the roulette wheel on the ophthalmoscope can adjust the power, and beginners need to practice holding the lens with one hand before the examination, and keep the ophthalmoscope close to the bridge of the nose near the medial canthus or forehead (adjust it in the best position for yourself, be sure to fit the face at the beginning), so that the line of sight can pass smoothly through the small hole, and use the index finger of one hand to adjust the roulette wheel to increase or decrease the power, this step needs to be mastered.

In the third step, the refractive medium is checked for opacity using side illumination: the ophthalmoscope is held in the same way as in the third step, 10 15 cm away from the patient's eyes, the wheel is adjusted to "+12d +20d" (i.e., black scale 8 or 10), the cornea and lens are examined, and then the vitreous is observed with "+8d +10d".

If there is a black shadow in the red reflection, ask the subject to move the eyeball, and if the direction of the black shadow is consistent with the direction of eye movement, it indicates that the cloudy part is in front of the lens; If it moves in the opposite direction, it indicates that the turbidity is behind the lens.

Fourth, due to the different diopters of each person, it is necessary to adjust the roulette wheel on the fundus mirror to see the fundus clearly, and most people have negative diopters due to myopia or cataracts, so when starting the examination, the roulette wheel is generally adjusted to the "0" scale first, and then rotated in the red direction.

In the fifth step, when examining the fundus, the patient is instructed to look straight ahead. Since the ophthalmoscope follows the principle of "three points and one line", just like targeting, beginners often cannot see the fundus because they do not put the eye, the ophthalmoscope and the patient's pupil in the same straight line.

The slit lamp is the most routine examination of ophthalmology, and the diseases on the ocular surface can be seen through the slit lamp, which belongs to the microscope, such as trichiasis under the slit lamp, and the symptoms of trichiasis will be obvious under the slit lamp, and the conjunctival inflammation can be found through the slit lamp examination, and the conjunctival follicles and capillary arrangement on the surface of the conjunctiva can be found to be disordered in the crevice lamp during keratitis, and the cornea is grayish-white under the slit lamp, which generally needs to be carried out with antibiotics**, and after entering the foreign body in the eye, it can also be shown under the slit lamp. For example, a conjunctival foreign body or corneal foreign body can only be removed in time under a slit lamp, and for intraocular conditions, cataracts can be detected mainly through a slit lamp, and the lens can be found to be cloudy.

What do you mean? Are you an ophthalmologist asking how should I be examined?