Farsightedness: Description People who cannot see close objects sharply are considered to be farsighted. In most cases, this is due to an eyeball that is too short. Doctors then speak of axial hyperopia. Much rarer is the so-called refractive hyperopia: In this case, the farsightedness is due to an insufficient refractive power of the eye, … Hyperopia: Causes, Symptoms, Treatment, Progression
Definition Visual acuity (visual acuity, visual acuity, minimum separable) indicates the measurable degree of ability to recognize patterns and contours in the outside world as such. Minimum visibile Minimum visibile is the limit of visibility. This is reached when objects that are viewed and imaged on the retina can no longer be distinguished as contour … The visual acuity
Physiology of visual acuity Human visual acuity depends on several sizes: Physically the size of the pupil limits the resolution of the eyeball, physiologically the resolution is determined by the density of the receptors (rods and cones) and the signal processing of the receptive fields of the retina. The resolution reaches its maximum value when … Physiology of visual acuity | The visual acuity
Synonyms in a broader sense Hyperopia, hyperopia, hypermetropia, presbyopia, hyperopia, astigmatism, nearsightedness Definition In farsightedness (hyperopia) there is an imbalance between the refractive power and the length of the eyeball. Long-sighted people see well at a distance, but objects appear blurred at close range. The eyeball is too short in relation to the refractive power … Long-sightedness
SymptomsComplaints The simplest sign of farsightedness is a blurred or blurred image of nearby objects. In small children, strabismus often occurs due to the nervous coupling of accommodation and convergent movement of the eye (the fixation of a point with both eyes). Strabismus occurs, strabismus (esotropia). Other symptoms that can be caused by the constantly … SymptomsComplaints | Long-sightedness
Therapy Long-sightedness There are now several treatment options for the correction of farsightedness. The oldest solution is glasses. Later contact lenses were developed. Basically, contact lenses are small elastic lenses that are placed on the cornea. The advantage is that you do not immediately see that you are wearing glasses (cosmetic effect) and when doing … Therapy Long-sightedness | Long-sightedness
As early as around the year 1000, an Arab scholar came up with the idea of supporting the eye by means of optical lenses. Around 1240, monks put this idea into practice – the birth of eyeglasses. For centuries, they were the only way to correct defective vision. But in recent years, they have had … Eye Laser and Other Modern Methods
Definition The visual acuity of the eyes is tested with an eye test. This indicates the resolving power of the eye, i.e. the ability of the retina to recognize two points as separate. The visual acuity defined as normal is at a visual acuity of 1.0 (100 percent). Adolescents often achieve even better visual acuity … Eye test
2. shihara color plates In 1917, this method with test images of different colored dots that form a complete picture was developed by the Japanese ophthalmologist Shinobu Ishihara. The test is based on the fact that “normal sighted people” can recognize different motifs by differentiating between red and green on the test images than people … 2. shihara color plates | Eye test
Definition The most common visual disorders in children are myopia, hyperopia or strabismus. The visual defects can be either acquired or congenital. In order to detect visual disorders at an early stage and to treat them, U9 carries out an eye test at the age of five years before entering school. In the other U … Visual disorders in children
Treatment The treatment of myopia is done with the help of glasses. Minus glasses are used for this. The glasses should be adjusted by an ophthalmologist. With minus lenses, vision at a distance becomes worse and worse. Therefore, glasses should never overcorrect vision so that the eye has a chance to work on its own. … Treatment | Visual disorders in children
Leber’s congenital amaurosis is a hereditary disorder of the function of the retina of the eye. Primarily, a specific pigment epithelium located on the retina is affected by the impairment. The term of the disease is derived from the Greek word ‘amauros’, which means blind or dark. Leber’s congenital amaurosis is congenital and also includes … Leber Congenital Amaurosis: Causes, Symptoms & Treatment
