Hyperopia:
the invisible defect
that strains the eyes.

Hyperopia is the most underestimated refractive defect. The myope sees poorly at distance and knows it. The hyperope, especially if young, apparently sees well at all distances — because their lens works continuously to compensate for an eye that is too short. But this work has a cost: visual fatigue, headaches, concentration difficulties, and presbyopia that arrives earlier than expected.

How hyperopia works

In the hyperopic eye, the globe is too short relative to the optical power of the cornea and lens. Light converges at a focal point behind the retina instead of on it. To bring the focus back onto the retina, the lens must increase its curvature — a process called accommodation. In young people, the lens is elastic and compensates without apparent effort. But this compensation is constant: the hyperopic eye accommodates even for distance vision, when an emmetropic eye would be at rest.

The result is a visual system that never relaxes. Up close, the effort doubles: accommodation for near vision is added to that for compensating the hyperopia. Reading, working at a computer, sewing — every near activity becomes tiring.

Latent hyperopia: the hidden defect

This is the trap of hyperopia. A 25-year-old with +3.00 D of hyperopia can have 10/10 vision without glasses, at distance and up close. The autorefractometer measures only +1.00 D — because the lens compensates for the other 2 dioptres during the measurement itself. The difference between manifest hyperopia (what is measured) and total hyperopia (the real one) is called latent hyperopia.

Hyperopia and early presbyopia

The hyperope is the first to become presbyopic. Why? Because their accommodation reserve is already partly used to compensate for the distance defect. When, around age 40-45, total accommodation decreases physiologically, the hyperope loses reading ability first — because they started with less reserve.

A 45-year-old emmetrope notices presbyopia. A +2.00 D hyperope notices it at 38-40 years — five years earlier. And in addition to presbyopia, they suddenly discover they need glasses even for driving: the latent hyperopia "unmasks" itself when the lens loses the ability to compensate.

Laser correction of hyperopia: how it works

Laser correction of myopia flattens the centre of the cornea to reduce refractive power. Correction of hyperopia does the opposite: it steepens the centre of the cornea to increase it. The laser removes tissue from the periphery, causing an increase in central curvature through biomechanical effect.

This difference has two important technical consequences. First: peripheral ablation requires a wider optical zone than for myopia, and therefore more tissue to remove per dioptre. Second: the biomechanical response of the cornea to peripheral ablation is less predictable than the central response — the cornea tends to regress slightly towards its original curvature in the first months.

Limits of correction

Laser correction of hyperopia is routine up to +4.00 / +5.00 D. Beyond that, the amount of tissue to remove increases considerably and the predictability of the result decreases. For hyperopia above +6.00 D, alternatives — phakic ICL lenses or lens exchange — should be considered, bearing in mind that these involve intraocular surgery with a different and higher risk profile.

An often overlooked factor: hyperopia tends to increase slightly with age, unlike myopia which stabilises. This means a patient operated at 30 for +2.50 D might need an enhancement ten years later if the hyperopia progresses. With TransPRK SmartSurfACE, enhancement is possible because there is no flap to lift — the laser works again on the surface.

ForeSight: simulating the hyperopic cornea

The ForeSight simulation is particularly valuable in hyperopia, where the biomechanical response is less predictable. The surgeon visualises the expected corneal profile after central steepening, verifies that the optical zone is sufficient for the patient's pupil diameter, and compares different correction scenarios — total, partial, or combined with presbyopia.

Hyperopia + presbyopia: one procedure, two solutions

The presbyopic hyperope is the ideal candidate for PresbyMAX. In a single treatment, the bi-aspheric profile corrects hyperopia (by steepening the centre) and creates multifocality for presbyopia (by distributing power across three distances). The patient is freed from distance and near glasses in the same procedure. Learn more: Presbyopia after 45 →

TransPRK: why for hyperopia

TransPRK SmartSurfACE offers specific advantages for hyperopia correction. The absence of a flap preserves biomechanical integrity — crucial when peripheral ablation stresses the corneal structure. The 7D eye-tracker at 1050 Hz compensates for eye movements during a treatment that lasts longer than myopic treatment (the ablation zone is wider). And intraoperative pachymetry verifies in real time that the tissue removed matches the plan — an additional safety measure in a treatment where predictability is inherently lower.

Symptoms that should suggest hyperopia

If you recognise one or more of these signs, you could be hyperopic without knowing it: visual fatigue at the end of the day, frontal headaches after reading or computer work, concentration difficulties with near vision, a feeling of seeing "better" outdoors than indoors, presbyopia appearing before age 45, transient blurred vision when switching from near to far.

The diagnostic examination — free and without obligation — includes the defocus test and, if necessary, cycloplegic refraction. In 30 minutes we know if you are hyperopic, by how much, and what can be done.