Lenses for keratoconus in adults

Ker­a­to­conus is a pathol­o­gy in which the cornea thins and bulges for­ward, result­ing in a cone shape. Often this con­di­tion pro­vokes astig­ma­tism or myopia. Is it pos­si­ble to wear lens­es with such a pathol­o­gy?
Lenses for keratoconus in adults
Lens­es for ker­a­to­conus in adults.

With the devel­op­ment of ker­a­to­conus in the ini­tial stage, it is pos­si­ble to cor­rect vision prob­lems with ordi­nary con­tact lens­es. But at a lat­er date, the selec­tion of spe­cif­ic, ker­a­to­conus lens­es is nec­es­sary.

Ker­a­to­conus occurs as a result of a dys­troph­ic process in the cornea, which leads to its thin­ning, the for­ma­tion of a cone-shaped pro­tru­sion. Although the pathol­o­gy itself has been described for a long time, the exact cause of its devel­op­ment has not been estab­lished to date, and after the diag­no­sis is made, it is dif­fi­cult to deter­mine what the course will be.

Man­i­fes­ta­tions occur at a young age, usu­al­ly at 15–25 years, devel­op­ment is pos­si­ble both rapid and slow, some­times the dis­ease dis­ap­pears spon­ta­neous­ly, but in some cas­es pro­gres­sion occurs with defor­ma­tion of the cornea.

Among the key com­plaints, there may be dou­ble vision, signs of myopia, which becomes the rea­son for the selec­tion of glass­es or lens­es, but they help for a short time and reveal the true cause of the pathol­o­gy in the topog­ra­phy of the cornea.

Basi­cal­ly, with ker­a­to­conus, myopia or astig­ma­tism occurs, which is asso­ci­at­ed with a change in the cur­va­ture of the cornea, but stan­dard lens­es or glass­es become “small” in less than a year due to the pro­gres­sion of opti­cal dis­or­ders.

Can I wear lenses with keratoconus?

It is impor­tant to empha­size that the use of glass­es or lens­es in the devel­op­ment of ker­a­to­conus does not help in the treat­ment of pathol­o­gy. Opti­cal prod­ucts only help to com­pen­sate for exist­ing visu­al defects, but the dis­ease itself can con­tin­ue its pro­gres­sion.

Glass­es for the cor­rec­tion of visu­al patholo­gies against the back­ground of ker­a­to­conus are rarely used, they can­not com­plete­ly elim­i­nate aber­ra­tions. Con­tact lens­es fit snug­ly to the sur­face of the cornea, and there­fore help in the elim­i­na­tion of visu­al dis­tur­bances.

Which lenses are best for keratoconus?

Soft stan­dard lens­es can only be used in the ini­tial stage of pathol­o­gy, if the refrac­tive changes are up to 2.5 diopters. Sub­se­quent­ly, clear­er vision can be achieved by using a toric design lens. In addi­tion, it is nec­es­sary to choose mod­els with sil­i­co-hydro­gel mate­r­i­al, due to their high gas per­me­abil­i­ty.


How to choose lens­es for the eyes: advice from doc­tors

In the late stage of the dis­ease, spe­cial­ized ker­a­to­conus lens­es are used, they are made only to order accord­ing to the indi­vid­ual size of the cornea. They can be either soft or hard or hybrid.

What is the difference between keratoconus lenses and regular lenses?

The selec­tion of lens­es for patients with ker­a­to­conus should only be han­dled by an oph­thal­mol­o­gist. They will be made indi­vid­u­al­ly, accord­ing to the size of the cornea. If these are soft prod­ucts that are per­formed indi­vid­u­al­ly, they are divid­ed into two groups:

  • axisym­met­ric, hav­ing a thick­en­ing in the cen­ter — these lens­es can cor­rect myopia, but are not able to elim­i­nate astig­ma­tism, they are suit­able only for ker­a­to­conus, in which the cornea is less dam­aged in the cen­ter than in the periph­ery;
  • toric lens­es will help with astig­ma­tism, espe­cial­ly with its high degree.
Contact lenses for eyes.  Photo: Pixabay
Pho­to: Pix­abay

If these are hard lens­es, they are also divid­ed by size and divid­ed into two groups:

  • with a small diam­e­ter (up to 10 mm), corneal — quite often sev­er­al dif­fer­ent pairs of lens­es of dif­fer­ent designs are made to order, select­ing them for max­i­mum wear­ing com­fort.
  • with a large size (from 13.5 mm or more), cor­neoscle­r­al or scle­r­al, gas-per­me­able prod­ucts that, when worn, rest on the scle­ra with­out touch­ing the area of ​​​​the ker­a­to­conus itself — they are more com­fort­able, but more dif­fi­cult to select.

Hybrid prod­ucts are a com­bi­na­tion of the two pre­vi­ous groups. Their cen­tral part is made of an oxy­gen-per­me­able mate­r­i­al, but on the periph­ery they are soft, made of sil­i­cone hydro­gel. These lens­es are com­fort­able, well fixed on the cornea, pro­vide high-qual­i­ty vision cor­rec­tion, but they can­not be used when the cornea is dry.

Reviews of doctors about lenses for keratoconus

“Giv­en the severe astig­ma­tism that accom­pa­nies ker­a­to­conus, as a rule, con­tact cor­rec­tion becomes an option for achiev­ing the best visu­al acu­ity,” says oph­thal­mol­o­gist Max­im Kolomeyt­sev. – Tim­ing and fre­quen­cy of lens replace­ment can vary great­ly depend­ing on the type of lens cho­sen (soft con­tact lens­es or rigid gas per­me­able lens­es) and the rate of dis­ease pro­gres­sion.

Popular questions and answers

We spoke with oph­thal­mol­o­gist Max­im Kolomeyt­sev about the prob­lem of ker­a­to­conus and lens cor­rec­tion in it, clar­i­fied some of the nuances of treat­ment.

Are there any contraindications for lens correction of keratoconus?

As a rule, in cas­es of severe ker­a­to­conus with the for­ma­tion of mas­sive scars on the cornea, which reduce its trans­paren­cy, there is no longer any need for opti­cal vision cor­rec­tion. In such cas­es, the issue of sur­gi­cal treat­ment of ker­a­to­conus (corneal trans­plan­ta­tion) is solved.

What to do if the lenses do not help?

In cas­es where it is impos­si­ble to achieve a sat­is­fac­to­ry effect in the lens­es in terms of visu­al acu­ity, the issue of sur­gi­cal treat­ment of ker­a­to­conus is resolved.

Can lenses worsen the pathology, lead to complications?

Incor­rect­ly select­ed lens­es can aggra­vate the course of the dis­ease, due to addi­tion­al mechan­i­cal dam­age to the cornea. This may be a trig­ger for a faster rate of dis­ease pro­gres­sion.

От Yraa

Добавить комментарий