Carl Halladay Abraham

Lecturer · Optometry

Lecturer, Univeristy of Cape Coast

Lecturer, University of Cape Coast, since 2018per ORCID

In their own words

Low Vision
Refrative Error
Vision Impairment

Publications: 532003–2026
Citations: 462to those papers
h-index: 12i10-index 16
Field-weighted impact: 1.611.00 is the world average
World top 10%: 10%4 of 42 scored papers
Open access: 56%24 of the 43 whose access is recorded

In 2016–2025: 36 publications, 362 citations to them, h-index 10.

By year

Papers, and the citations to them

Publications, left axisCitations to that year’s papers, right axis2026 still in progress

Citations received each year

PeerfordGoogle Scholar

To all their work, old papers included. Google Scholar also counts citations from theses, books and web pages, so its line runs higher.

What they work on

From the classification of each paper

Subfields

Epidemiology2547%
Ophthalmology1936%
Radiology, Nuclear Medicine and Imaging1223%
Cognitive Neuroscience713%
Social Psychology611%
Public Health, Environmental and Occupational Health59%
Pediatrics, Perinatology and Child Health48%
Human-Computer Interaction36%
Finance24%
Infectious Diseases24%

Health Sciences
Life Sciences
Physical Sciences
Social Sciences

Topics most written on

Ophthalmology and Visual Impairment Studies24
Glaucoma and retinal disorders9
Ergonomics and Musculoskeletal Disorders6
Ophthalmology and Visual Health Research6
Retinal Imaging and Analysis6
Tactile and Sensory Interactions6
Global Maternal and Child Health4
Corneal surgery and disorders3
Ocular Infections and Treatments3
Retinopathy of Prematurity Studies3
Gaze Tracking and Assistive Technology2
Global Health and Surgery2

Who they write with

121 co-authors, here and elsewhere

Same unit
Same university
Same country
Elsewhere in Africa
No African institution

The 30 most frequent of 121 co-authors. Circle area and line width are papers written together; the strongest ties sit nearest. 1 paper with more than fifty authors left out, as their author lists say little about who works with whom. “No African institution” is anyone the papers place outside Africa’s institutions; Peerford records affiliations only there.

Where their co-authors are

56% of their 43 papers with recorded affiliations have a co-author abroad

papers co-written1234567Home

Most frequent partner countries

South Africa7
United Kingdom7
United States3
China3
India3
Trinidad & Tobago2
Finland2
Nigeria2

Papers with at least one author in that country.

Institutions written with most

University of KwaZulu-NatalZA7 papers
Seventh day Adventist HospitalIN3 papers
Central South UniversityCN2 papers
University of St AndrewsGB2 papers
University of the West IndiesTT2 papers
University of Eastern FinlandFI2 papers
Second Xiangya Hospital of Central South UniversityCN2 papers
Anglia Ruskin UniversityGB2 papers
Klintaps University College of Health and Allied SciencesGH2 papers
Sunyani Technical UniversityGH2 papers

Where they publish

Clinical and Experimental Optometry5
Investigative Ophthalmology & Visual Science5
British Journal of Visual Impairment4
African vision and eye health3
BMJ Innovations3
Optometry and Vision Science3

Development goals addressed

From each paper’s title and abstract

4Quality education7
3Good health and well-being5
1No poverty4
10Reduced inequalities3
11Sustainable cities and communities2
5Gender equality1
13Climate action1
14

Most cited

Grand Challenges in global eye health: a global prioritisation process using Delphi method
Carl Halladay Abraham
The Lancet Healthy Longevity
202252 citationsWorld top 10%Open access · Gold
Smartphone usage among people living with severe visual impairment and blindness
Carl Halladay Abraham, Enyam Morny, Samuel Bert Boadi-Kusi Od
Assistive Technology
202151 citations

Career

As their ORCID record read on October 4, 2026

Positions

Lecturer, School of Optometry and Vision ScienceUniversity of Cape Coastsince 2018
Head of Department, Optometry DepartmentMalawi College of Health Sciences2014–2018
Principal Research Assistant, Department of OptometryUniversity of Cape Coast2013–2014

Education

MSc Clinical Optometry, School of Optometry and Vision Science (WOPEC)Cardiff University2013–2017
Professional Certificate in Low Vision, School of Optometry and Vision Science (WOPEC)Cardiff University2013–2015
Doctor of Optometry, Department of OptometryUniversity of Cape Coast2005–2011

Honours, memberships and service

MemberAllied Health Professions Councilsince 2012
MemberGhana Optometric Associationsince 2011

How it can be read

56% free to read, of the 43 recorded

Diamond 2 · 4%Free to read and to publish
Gold 17 · 32%In an open-access journal
Hybrid 1 · 2%Open in a subscription journal
Bronze 3 · 6%Free to read, no open licence
Green 1 · 2%A copy in a repository
Closed 19 · 36%Behind a paywall
Unknown 10 · 19%Not recorded by the source

Who funds it

4 of 53 papers name a funder

Alan Turing Institute1
British Council for Prevention of Blindness1
Buchanan Charitable Foundation1
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior1
Fred Hollows Foundation1
Higher Education Funding Council for Wales1
Moorfields Eye Charity1
National Institute for Health and Care Research1