Abstract: arc spot (crescent) is one of the characteristic manifestations of myopia. The incidence of mild myopia is 40%, moderate myopia is 60%, and high myopia can exceed 70%. There is no difference between men and women., What is the fundus change caused by high myopia? Fundus is a very professional term. Most people don’t understand what it means. It has a vital reason with our myopia. The most important and common clinical manifestation of fundus signs in myopia is fundus change., The fundus changes of high myopia can be divided into 5 grades: Grade 1 (myopia I): normal or leopard shaped., Grade II (myopia II): Leopard stria + retroscleral staphyloma., Grade III (myopia III): leopard print + posterior staphyloma + paint crack., Grade IV (myopia Ⅳ): localized retinal and choroidal atrophy and / or Fuchs spots., Grade 5 (myopia V): extensive map like retinal choroidal atrophy in the posterior pole., (1) leopard shaped fundus: Leopard shaped fundus (funduster) is a major feature of myopia. As the eyeball elongates backward, retinal blood vessels straighten and thin when they leave the optic disc.,
what is the fundus change caused by high myopia? Fundus is a very professional term. Most people don’t understand what it means. It has a vital reason with our myopia. The most important and common clinical manifestation of fundus signs in myopia is fundus change. The fundus changes of
and
high myopia were divided into 5 grades:
and
grade I (myopia I): normal or leopard like.
grade II (myopia II): Leopard stria + retroscleral staphyloma.
grade III (myopia III): leopard pattern + posterior staphyloma + paint crack.
grade IV (myopia Ⅳ): localized retinal, choroidal atrophy and / or Fuchs spots.
grade 5 (myopia V): extensive map like retinal choroidal atrophy spots appear in the posterior pole.
(1) leopard shaped fundus: Leopard shaped fundus (teselled fundus; funduser) is a major feature of myopia. As the eyeball elongates backward, retinal blood vessels straighten and thin when they leave the optic disc.
(2) optic disc: the shape of the optic disc is affected by the path of the optic nerve through the optic canal, which is usually at right angles. The optic nerve axis of myopia is inclined to the temporal side and into the ball.
(3) arc spot: arc spot is one of the characteristic manifestations of myopia. The incidence of mild myopia is 40%, moderate myopia is 60%, and high myopia can exceed 70%. There is no difference between men and women. Due to the backward elongation of the eyeball, the choroid around the optic disc is pulled away from the optic disc, and the corresponding sclera is exposed to form a unique arc spot.
(4) macula: the presence or absence of lesions in the macular area and the degree of lesions directly determine the visual function of myopia. The macular region of simple myopia can maintain a normal state, but degenerative myopia is mostly involved with a high incidence.
(5) Fuchs spot: Fuchs’ spot is also a characteristic manifestation of degenerative myopia. It was first introduced by Forster and Fuchs respectively, so it is also called Forster Fuchs spot. The macular area is a slightly raised circular, oval or irregularly shaped dark spot. It is gray black or gray green, located in or near the fovea, about 1 / 3 ~ 3 / 4 of the size of the optic disc.