What's the difference between hemeralopia and nyctalopia?

Hemeralopia


Definition:

  • (n.) A disease of the eyes, in consequence of which a person can see clearly or without pain only by daylight or a strong artificial light; day sight.

Example Sentences:

  • (1) That means that in addition to the simple fundus heterotopicus, there is also a form with several clinical characteristics in which a hemeralopia is adaptometrically and electroretinographically demonstrable.
  • (2) A high index of suspicion should prompt specific questioning about hemeralopia, or reduced visual function in brightly illuminated situations, and better vision in twilight or under dim illumination.
  • (3) Electrophysiological and fluorescenceangiographical examinations were carried out in a case of fundus albipunctatus cum hemeralopia congenita.
  • (4) Patients may falsely describe hemeralopia as "glare" or "photophobia."
  • (5) From the clinical point of view avitaminoses can be distinguished in deficiency with: a) a complete clinical symptomatology (scurvy, beriberi, pellagra, rickets, osteomalacia, xerophthalmia, hemeralopia); b) an incomplete clinical symptomatology (mono- or oligo-symptomatic or partial clinical picture); c) a biochemical symptomatology only (subclinic or clinically asymptomatic picture).
  • (6) Bartisch reports several diseases for the first time: Allergic reactions, sympathetic ophthalmia, hemeralopia, photoelectric keratoconjunctivitis, amaurosis due to toxemia of pregnancy.
  • (7) The prognosis for visual function was not highly correlated to the type diagnosis or to the age when hemeralopia was first noticed.
  • (8) As the first visual impairment, hemeralopia is noted during the second decade of life.
  • (9) Where hemeralopia was present, the ERG showed a monophasic a-wave and a markedly reduced b-wave.
  • (10) The clinical picture of AIED includes myopia and astigmatism, reduced visual acuity, nystagmus, ocular albinism, hemeralopia and dyschromatopsia (No.
  • (11) The patient then developed successively focal epileptic seizures, temper disorders, a cardiomyopathy, a pepper and salt retinopathy with hemeralopia, a left hemiplegia, deafness, and fever of unexplained origin.
  • (12) They can present with the classic symptoms of hemeralopia, poor acuity, and reduced color vision, but these complaints may be absent.
  • (13) An elderly male was referred for evaluation of hemeralopia when cataract extraction did not alleviate his symptom of difficulty seeing in bright illumination.
  • (14) toxicity (65%), hemeralopia (27%), and alcohol intolerance (6.2%).
  • (15) The paper describes complex clinical investigations of visual functions in patients with alimentary and essential hemeralopias and shows that rods and cones do not function in conditions of scotopic illumination without the presence of rhodopsin.
  • (16) In contrast to essential hemeralopia, where the b-wave is completely lacking a gradual recovery of the b-wave was recorded in Lafora disease.
  • (17) Fundus changes and functional examination has been taken into account for the differential diagnosis of the condition from fundus albipunctatus cum hemeralopia.

Nyctalopia


Definition:

  • (n.) A disease of the eye, in consequence of which the patient can see well in a faint light or at twilight, but is unable to see during the day or in a strong light; day blindness.
  • (n.) See Moonblink.

Example Sentences:

  • (1) This ultimately produced nyctalopia, xerophthalmia and keratomalacia with bilateral corneal perforation.
  • (2) Nyctalopia is the only functional abnormality for the first 5 to 6 year of life.
  • (3) Clinically, patients have nyctalopia (night blindness), progressive visual field loss, and eventually loss of central vision.
  • (4) Although the retinal vascular changes with X-linked retinoschisis are similar to those seen with the Favre-Goldmann syndrome, a differentiation of the two diseases can be made by family studies, the presence or absence of nyctalopia, examination of the macular areas, measurement of dark adaptation, and electroretinogram determinations.
  • (5) This effect is absent in congenital nyctalopia and X-linked retinoschisis.
  • (6) Subjective symptoms were mild and variable, consisting mainly of relative nyctalopia.
  • (7) Four of these individuals complained of nyctalopia beginning in childhood.
  • (8) This was associated with nyctalopia, hyperopia, minimal vitreous opacities in the sister, a paramacular tapetal sheen reflex, normal retinal vessels, an abnormal electroretinogram, and a normal electro-oculogram in the less affected brother.
  • (9) We describe a 39-year-old white woman with severe visual loss, nyctalopia, vitritis and widespread loss of retinal pigment epithelium associated with vitiligo and alopecia, which may represent a variant of the Vogt-Koyanagi-Harada syndrome.
  • (10) Seven related patients had a progressive pigmentary retinal degeneration, characterized by nyctalopia, visual field restriction, and cystic macular degeneration in younger patients and a macula of nonspecific atrophic appearance in older patients.
  • (11) Nyctalopia developed in three patients one of whom developed decreased B-wave amplitude of the scotopic electroretinogram.
  • (12) On the basis of the electrophysiological results, the nature and localization of the defect causing nyctalopia are discussed.
  • (13) Patients from two families with X-linked recessive nyctalopia and myopia were investigated.
  • (14) A healthy, 14-year-old girl presented with nyctalopia, good vision, and multiple, irregular, yellowish lesions of the fundus.
  • (15) Of two brothers born of Sephardic first cousin parents one presented with congenital neural deafness, nyctalopia, visual field loss, flat ERG, unintelligible speech and a shuffling gait, and the other with severe ataxia, severe decreased visual acuity, mild field loss, decreased ERG, dysarthric speech and high grade myopia.
  • (16) Absence of nyctalopia, Bitot's spots, and xerosis, and lack of conjunctival goblet cell loss indicate that the anorexia nervosa group did not have vitamin A deficiency.
  • (17) The 15 categories evaluated were: visual acuity, visual field diameter, ring or central scotoma, nyctalopia, susceptibility to glare, refraction, cataract, electroretinography, colour of the optic disc, bone-spicule pigmentation of the retina, retinal vessel diameters, tapetoretinal reflex, sex, heredity, and age.
  • (18) Recent clinical and experimental studies suggest that zinc deficiency may play an important role in the pathogenesis of (1) acrodermatitis enteropathica, and in certain cases of (2) hypogonadal dwarfism, (3) congenital malformations, (4) hypogeusia and hyposmia, (5) nyctalopia and (6) impaired wound healing.
  • (19) Choroideremia (McK 30310), an X-linked hereditary retinal dystrophy, causes nyctalopia, progressive visual field loss, and ultimately central blindness in affected males in early adulthood.
  • (20) One patient had increasing disabling symptoms of nyctalopia and poor peripheral and central vision, whereas the other two patients remained asymptomatic with excellent central vision.

Words possibly related to "hemeralopia"

Words possibly related to "nyctalopia"