Different axis of the eye

Introduction Excessive axial length is a risk factor and intermediate link in the formation and development of high myopia fundus lesions, but it is not the initial cause. The outermost layer of light received from the eyeball, that is, the distance from the cornea-lens-vitrite-retina (the innermost layer of the light) is considered to be a central axis of the optical system in physics. This is called the "eye axis." The different axes of the eyeball or the excessive extension of the axial axis are all related to the high myopia fundus lesions and the central retinal vein occlusion.

Cause

The cause of the different axes of the eye:

The different axes of the eyeball or the excessive extension of the axial axis are all related to the high myopia fundus lesions and the central retinal vein occlusion. Over-extension of the eye axis is a risk factor and intermediate link in the formation and development of high myopia fundus lesions. Both parents have high myopia. 12 offspring are highly myopic (100%); 2 parents have high myopia, and the offspring are ill. (indicating that the other of the parents is heterozygous), 23 of the 40 children are highly myopic (57.5%), compared with the expected incidence (50%), P>0.05; 3 parents are normal, and the offspring are The 25 families (indicating both parents are heterozygous), 68 out of 197 children, after using Winburg and Lenz correction, the incidence rates were 21.3% and 22.2%, respectively, compared with the expected 25%. , P>0.05. But it is not the starting cause.

an examination

Related inspection

Ophthalmic examination eyeball and eyelid examination slit lamp

Examination and diagnosis of different axes of the eyeball:

The clinical features of high myopia are: the axial extension of the eye axis, the degenerative changes of the choroid of the retina, and the refractive power of myopia increase year by year. With the intervention and development of the ophthalmic ultrasonic detection technology, the axial length of the living eye can be performed. Finer measurement, inferred the influence of axial lengthening on the formation and development of fundus lesions, and then seek to control the extension of the axial length. The eye examination includes naked eye vision, corrected visual acuity, intraocular pressure measurement, etc., and computer optometry and dilated pupils. The cornea maper, corneal thickness gauge, slit lamp, etc. are also used to check the cornea, refractive interstitial, fundus, corneal thickness and radius of curvature.

Differential diagnosis

Symptoms of ocular confusion on different axes of the eye:

If myopia is higher than 6.00 diopters, it is called high myopia or pathological myopia. This type of myopia is progressive, and degenerative changes can occur in the advanced stage, so vision can be gradually reduced, and the glasses can not be corrected.

The obstruction of the central retinal vein is much more common than the central retinal artery occlusion. Although visual impairment is not as acute as arterial occlusion, it is also quite serious. Some cases may be completely blind due to secondary angiogenic glaucoma.

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