In a normal eye, light enters, crosses the cornea and the crystalline lens, and focuses on the retina like a perfectly adjusted projector. In a hyperopic eye, the eyeball is slightly too short, or the cornea too flat. Light rays theoretically converge behind the retina. The image is blurry, especially up close.
The major difference with myopia: the hyperopic eye has a natural compensation mechanism. The crystalline lens curves more to bring the image back onto the retina. This constant muscular work has a cost. It is that cost Sophie pays every evening.
The hyperopic eye. The globe is too short. The rays reach the retina before they have converged. The lens compensates constantly, which is why fatigue builds up by the end of the day.
After correction. A convex lens, or reshaping of the cornea, makes the rays converge sooner. The image forms on the retina and the accommodative effort stops.
A hyperope who "sees well" is making a constant effort. The eyes provide permanent, invisible work, and eventually complain about it.[1]
What it changes in daily life
Frontal headaches. Characteristic: above the eyes, mid or end of day, worsened by reading or screen use. They often disappear at weekends. How many patients have consulted neurologists or physiotherapists for these headaches without ever having a complete ophthalmic exam?
Vision that drops off at the end of the day. Correct in the morning, blurry by 6pm. The tired crystalline lens can no longer compensate as effectively as on waking.
In children: a signal not to miss. Uncorrected high hyperopia can cause convergent strabismus and, eventually, amblyopia. A child assumes everyone sees the way they do. A visual exam from age 3-4 is recommended, even without apparent complaint.[2]
The degrees of hyperopia
Low hyperopia · +0.25 to +2 D Often well compensated until the forties. Little or no blur but fatigue and headaches at the end of the day. Many are unaware of their condition.
Moderate hyperopia · +2 to +4 D Compensation becomes difficult with age. Near vision drops, fatigue sets in faster. Glasses become necessary.
High hyperopia · beyond +4 D Blurry vision both near and far, even in young patients. Surgical correction represents a radical change for these profiles.
Important detail: an apparent defect of +1.50 D can hide +3.00 D in reality. That is why the exam systematically includes refraction under cycloplegia to measure the real defect.[3]
Surgical options
Femto-LASIK and PRK Effective correction up to +4/+5 D depending on the corneal profile. The cornea is reshaped so that light converges correctly on the retina.
PRELEX For the hyperopic presbyope over 45. The natural crystalline lens, now rigid, is replaced by a multifocal implant. Treats hyperopia and presbyopia simultaneously.
Cycloplegia during the examMeasurement under cycloplegia (pupil dilation) is essential to evaluate real hyperopia. Without it, the compensation of the crystalline lens masks part of the defect.
References
Mutti DO, et al. Accommodative lag before and after the onset of myopia. Invest Ophthalmol Vis Sci. 2006;47(3):837-846.
Association Française de Strabologie et d'Ophtalmologie Pédiatrique (AFSOP). Dépistage des troubles visuels de l'enfant : recommandations. June 2019.
Frings A, Steinberg J, Druchkiv V, Linke SJ, Katz T. Role of preoperative cycloplegic refraction in LASIK treatment of hyperopia. Graefes Arch Clin Exp Ophthalmol. 2016;254(7):1399-1404. doi:10.1007/s00417-016-3358-2.
Frequently asked
What patients often ask
Can a hyperopic person have good visual acuity?
Yes. Up to a certain age, the crystalline lens automatically compensates for the defect. Vision seems normal, but the eye works constantly, generating fatigue and headaches.
At what age does hyperopia become bothersome?
Between 35 and 45 years of age, discomfort sets in progressively. After 45, presbyopia adds on and the situation often becomes difficult to manage without correction.
Can high hyperopia be operated on?
Yes, up to approximately +4 to +5 dioptres depending on the corneal profile. Beyond that, PRELEX is often more appropriate.
Hyperopia is the refractive error most easily missed in children, precisely because accommodation actively compensates. A hyperopic child can show normal acuity on a school screening test and still suffer from significant hyperopia.
Signals to watch for: intermittent convergent strabismus (the eye deviating inwards, especially when fixating up close), headaches at the end of the school day, concentration difficulties when reading. High hyperopia undiagnosed and uncorrected before age 7-8 can lead to amblyopia, a permanent drop in visual acuity in one eye.
An ophthalmic exam with cycloplegia is essential to measure hyperopia correctly in children. This exam is recommended from age 3-4, even in the absence of complaints.
Evolution with age
Hyperopia and presbyopia: when both accumulate
Hyperopia and presbyopia share the same compensation mechanism: the crystalline lens must adapt more to maintain a sharp image. When both coexist, which is common after 45, the lens is called upon both to correct the underlying refractive defect and to make up for the age-related loss of accommodation.
This accumulation explains why hyperopes often experience the first symptoms of presbyopia earlier than myopes. This is precisely the profile for which PRELEX offers the clearest results: a single procedure simultaneously corrects hyperopia, presbyopia, and definitively prevents future cataract.
Femto-LASIK and PRK treat hyperopia up to +4 to +5 dioptres. Beyond that, or when the cornea is insufficiently thick, ICL implants or PRELEX take over.
A CORRECTION POSSIBLE AT ANY AGE
Refractive surgery for hyperopia is possible as soon as the correction has been stable for at least two years and corneal criteria are met. There is no strict age limit: a hyperopic presbyopic patient can benefit from correction, often within a PRELEX procedure rather than laser. The initial consultation allows the option best suited to your profile and visual expectations to be determined in 45 minutes.
Author of this page
Dr Serdal Sanak
Ophthalmic surgeon · Refractive and cataract surgery
CHIREC Hôpital Delta, Brussels
Graduated from the ULB, trained at CHU de Liège and CHIREC. European Diploma in Ophthalmology (FEBO). Refractive and cataract surgery make up the bulk of my operating activity, with procedures every week at CHIREC Delta. Dual specialisation: corneal laser surgery (Femto-LASIK, PRK) and intraocular surgery (ICL, PRELEX, cataract). Consultations in French, Dutch, English, Turkish, Kurdish, Persian and Italian.
